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

 40% of Indians harbour tb bacilli
 In 2010,
       Global Incidence – 9.4million
       In india – 2.3million
Prevalence in India is 3.1 million
3,20,000 deaths…
                                       -WHO
TB declared as notifiable disease by
INDIAN GOVERNMENT on may9th
                2012



http://articles.timesofindia.indiatimes.com/2012-05-
09/india/31640562_1_mdr-tb-tb-cases-tb-diagnosis

Risk Factors
 Case series involving 60 patients


 38% Cirrhosis
                              
 33% Renal Failure with Peritoneal Dialysis

 27% Diabetes Mellitus

 18% Underlying Malignancy

 10% Systemic Corticosteroids

 2% AIDS

 12% No Risk Factors

                                               http://www.med.unc.edu


24th march 1882

  World TB DAY
PATHOGENESIS
STAGE 1
    ESTABLISHMENT
           

ALVEOLAR MACROPHAGE
INGESTS TB BACILLI
 M. tuberculosis blocks phagolysosome formation by
  inhbiting Ca2+ signals and the recruitment and
  assembly of the proteins that mediate phagosome-
  lysosome fusion




                          Fratti RA, et al. J cell Biol 2001

 Racial differences in macrophages microbicidal
  enzymes. Africans have macrophages less capable of
  destroying tb bacilli.
 Mutations in NRAMP-1 gene involved in pushing
  out Fe2+ ions from the phagolysosome.




                    Cellier MF, et al.   Microbes Infect 2007;
                                         9:1662.
STAGE 2 SYMBIOSIS
          
Tubercle bacilli ingested
By non activated newly recruited
Monocytes.
STAGE 2 SYMBIOSIS
           
 Incapable alveolar macrophage bursts.
 New monocytes from blood are recruited to the site
  mainly by c5a, Monocyte Chemoattractant protein-
  1(MCP-1)
 TB bacilli multiplies in these non activated
  monocytes.
 7-21 days (<3weeks) – primary TB.
 Comes to an end when Th1 cells enters the site
Secrete IFN γ          Activates
                              Macrophages



 T-
CELL
       Kills the inactivated
       macrophages which were
       allowing the tb bacilli growth
       inside them…
CMI or DTH???

Main difference is concentration of
       antigen required….
STAGE 3 EARLY STAGES
OF CASEOUS NECROSIS
                       
Non activated
Macrophages which
allowed the growth of
TB bacilli are killed by
DTH mediated by T-cells
Forming solid caseous
necrosis
up-regulation of ICAM-1, ELAM-1, VCAM-1, and
            other adhesion molecules
Activated endothelial cells presents tuberculin like
             antigen to macrophage
Leading to endothelial injury and its consequences


                                  J Leukoc Biol. 1996;60:692–703.
DTH AND CMI
      
      • T-CELLS


DTH
      • DESTROYS INACTIVATED
        MACROPHAGES IN WHICH BACILLI
        MULTIPLIES
      • INITIALLY BENEFICIAL



      • MACROPHAGES and T-CELLS


CMI
      • BACILLI MULTIPLYING INSIDE
        ACTIVATED MACROPHAGES ARE
        DESTROYED
      • BENEFICIAL TO THE HOST
STAGE 3 EARLY STAGES
OF CASEOUS NECROSIS
                           
TB bacilli remains live
but cannot multiply in
solid caseous material.

TB bacilli escaping from
the edges of caseous
necrosis are engulfed by
macrophages and
caseous centre enlarges.
STAGE 4 INTERPLAY OF
   CMI AND DTH
                      
ACTIVATED MACROPHAGES
WALLS OFF THE EXPANDING
CAVITY AND PREVENTS
FURTHER INCREASE IN
SIZE IN HOST WITH GOOD
CMI.
POOR CMI
                 
IN HOST WITH POOR CMI
DTH CONTINUES DESTROYS THE
BACILLI
AND LUNG TISSUE TOO.




 TB BACILL SPREADS THROUGH
 LYMPHATIC AND
 HEMATOGENOUS ROUTE TO
 OTHER ORGANS.
STAGE 5 LIQUEFACTION
    AND CAVITY
    FORMATION
          




  the large quantities of bacilli and their antigens in the liquefied
 caseum overwhelm a formerly effective CMI, causing progression of
 the disease and the destruction of local tissues, including the wall of
 an adjacent bronchus.

    when the caseum liquefies, the entering
     macrophages do not function effectively.
    Possibly, the entering macrophages are killed by
     toxic fatty acids originating from host cells, or the
     bacilli, or both.
    CAUSE OF LIQUEFACTION???




REF: Hemsworth GR, Kochan I. Secretion of antimycobacterial fatty acids by
normal and activated macrophages. Infect Immun. 1978;19:170–177.

GENERAL INVESTIGATIONS
                              
. Types of specimens:
1.Pulmonary specimens
     -Sputum
     -Gastric lavage
    -Transtracheal aspirations
    -Bronchoscopy
    -Laryngeal swabbing
2.Urine specimens
3.Tissue and body fluid specimens
4.Blood specimens
5.Wounds, skin lesions, and aspirates
Microscopy
 Sputum smears stained by
  Z-N stain                
 What is Smear Positivity
    All patients who have
     submitted two
     Specimens and found to
     be positive for
     identification of AFB
 Detecting AFB by
  fluorochrome stain using
  fluorescence microscopy
 Culturing for isolation of
  Mycobacterium spp
  continues to be a Gold
  standard
      Agar based     4-6weeks
      egg based
      BACTEC – 14.8days
      MGIT- 13.3days
NEWER METHODS
          
 PCR SENSITIVITY-92% SPECIFICITY-99%
 INTERFERON –γ release assays.




  QuantiFERON-         TB SPOT
  TB
  SENSITIVITY-81%     SENSITIVITY-87.5%
  SPECIFICITY-91.2%   SPECIFICITY-86.3%
GASTROINTESTINAL
  TUBERCULOSIS

 Epidemiology
 Pathogenesis
 Clinical features
 Diagnosis
Epidemiology
                   
 Upto 1% of hospital admissions
 More common in immuno-suppressed
 Isolated abdominal tuberculosis:
   Unselected autopsy series- 0.02 - 5.1%
   Higher prevalence in females in India (3:1–4:1)

   Mainly disease of young adults

   ~ 2/3 of pt. are 21-40 yr old
TB & HIV
                    
 Incidence severity of
  abdominal TB will increase with
  the HIV epidemic

 HIV – 50 % develop abdominal TB
Pathogenesis
                   
 Mechanisms by which M. tuberculosis reach the GIT:

    Hematogenous spread from primary lung focus
    Ingestion of bacilli in sputum from active
     pulmonary focus.
    Direct spread from adjacent organs.
    Via lymph channels from infected LN
 In India, organism from all intestinal lesions – M.
  tuberculosis and not M. bovis.
Types
                        
 Ulcerative
 Hyperplastic
 Ulcerohyperplastic
 Diffuse colitis
 Sclerotic
PATHOLOGY
Most active inflammation in submucosa.

               Bacilli in depth of mucosal glands


                   Inflammatory reaction


          Phagocytes carry bacilli to Peyers Patches


                    Formation of tubercle


                  Tubercles undergo necrosis
PATHOLOGY
                 
   Submucosal tubercles enlarge

       Endarteritis & edema


             Sloughing


         Ulcer formation


Accumulation of collagenous tissue


    Thickening & Stenosis
PATHOLOGY
                           
Inflammatory process in submucosa penetrates to serosa

            Tubercles on serosal surface

                Bacilli reach lymphatics


                  Bacilli via lymphatics




  Lymphatic obstruction           Regional lymph nodes
  of mesentery and bowel          • Hyperplasia
     Thick fixed mass             • Caseation necrosis
                                  • Calcification
Order of Frequency
                
Ileum > caecum > ascending colon > jejunum

>appendix > sigmoid > rectum > duodenum

> stomach > oesophagus

 More than one site may be involved

 Bhansali - ileum involved in 102 and caecum in 100 of 196
  pt.
 Prakash - ileocaecal involvement in 162 of 300 pt.
 Most common site - ILEOCAECAL REGION




                     WHY?

 Increased physiological stasis
 Increased rate of fluid and electrolyte absorption
 Minimal digestive activity
 Abundance of lymphoid tissue at this site.
Clinical features
 Constitutional symptoms
                          
    Fever (40%-70%)
    Weight loss (40%-90%)
    Anorexia
    Malaise
 Pain (80%-95%)
    Colicky (luminal stenosis)
    Continous ( LN involvement)
 Altered bowel habits
Ileocecal TB
                     
 Colicky abdominal pain

 Ball rolling in abdomen

 Borborygmi

 Right iliac fossa lump - ileocaecal region,   mesenteric fat
  and LN
Isolated Colonic TB
                

 9.2% of all cases


 Multifocal involvement in ~ 1/3 (28% to 44%)
Anorectal TB
                   
 Hematochezia - most common symp. Due to mucosal
  trauma by stool

 Constitutional symptoms

 Constipation

 Rectal stricture

 Anal fistula – usually multiple
Gastroduodenal TB
                          of total cases
 Stomach and duodenum each ~ 1%
 Mimics PUD - shorter history, non response to t/t
 Mimics gastric Ca.
 Duodenal obstruction - extrinsic compression by tuberculous
  LN
 Hematemesis / Perforation / Fistulae / Obstructive jaundice
 Cx-Ray usually normal
 Endoscopic picture - non specific
Esophageal TB
                 
 Rare ~ 0.2% of total cases

 By extension from adjacent LN

 Low grade fever / Dysphagia     /   Odynophagia   /
  Midesophageal ulcer

 Mimics esophageal Ca
Complications
            
 OBSTRUCTION

 PERFORATION

 MALABSORPTION
Obstruction
                     
 Pathogenesis
    Hyperplastic caecal TB
    Strictures (napkin ring) of the small intestine
    Adhesions
    Adjacent LN involvement          traction, narrowing
     and fixation of bowel loops.
 In India ~ 3% to 20% of bowel obstruction
                      (Bhansali and Sethna).
Malabsorption
                           
 2nd most common cause in India
 Pathogenesis
   bacterial overgrowth in stagnant loop
   bile salt deconjugation
   diminished absorptive surface due to ulceration
   involvement of lymphatics and LN

75% pt with intestinal obstruction

40% of those without (Tandon et al)
Perforation
                    
 5%-9% of SI perforations in India

 2nd commonest cause after typhoid

 Usually single and proximal to a stricture

 Clue - Chest x-ray,

 Pneumoperitoneum in ~ 50% cases

Investigations


Intestinal TB cont.
 CT scan shows thickening
                           
 of the cecum with pericecal
 inflammatory changes.
 Mesenteric lymph nodes are
 also evident (arrows).
Endoscopy
 Nodules

                          
   Variable sizes (2 to 6mm)
   Non friable
   Most common in caecum especially near IC valve.
 Tubercular ulcers
   Large (10 to 20mm) or small (3 to 5mm)
   Located between the nodules
   Single or multiple
   Transversely oriented / circumferential contrast to
    Crohns
   Healing of these ‘girdle ulcers’ strictures
 Deformed and edematous ileocaecal valve

                     Esophageal TB Nodules




TB mass in stomach                    T.B. ulceration with narrow lumen

Is endoscopy diagnostic?

 8 –10 Bx from ulcer edge
 low yield on histopath as mainly submucosal disease
 Granulomas in 8%-48%
 Caseation in ~ 1/3 (33%-38%) of + cases
 AFB stains - variable
 Culture positivity in 40%
 Combination of histology & culture        diagnosis in 80% (
  S K Sharma)
Take home message
                 
 Ileocecal TB is the most common intestinal TB
 Combination of histology & culture is necessary for diagnosis.
 Surgery is the only answer
AN   OVERLOOKED   DIAGNOSIS
DIAGNOSTIC
       CHALLENGES
           
Non specific presentation


Insidious presentation


Mimicks malignancy


Unhelpful labaratory tests
EPIDEMOLOGY


PATHOGENESIS


CLINICAL FEATURES


DIAGNOSIS


TREATMENT
EPIDEMOLOGY
           
6th most common extra pulmonary site


Incidence- 0.1% to 0.7% worldwide


Rising incidence


sexes are equally affected


35 and 45 years of age.
PATHOGENESIS
         
 Activation of quiscent foci of infection(common)



     Direct spread –mesentric Lymph nodes
                   –Intraabdominal organs


            •Hematogenous spread from
–Primary pulmonary TB
–Miliary TB


CLINICAL PICTURE
CLINICAL
                   PRESENTATION
                        

     wet-ascitic                         dry-plastic form(less
                        fibrotic-fixed                           Encysted(loculated)
   (most common)                              common)

• ascites           •Mass formation      • adhesions             • localized
• ±peritonitis      •Matting of bowel    • „doughy feel‟          abdominal swelling
                     loops               • tender abdominal
                                          masses.
CLINICAL FEATURES
         
 Case series involving 145 patients

 73% Abdominal swelling (ascites) – most common
 64% Abdominal pain
 54% Fever and night sweats
 44% Weight loss
 18% both pulmonary & abdominal TB
 Hepatomegaly and splenomegaly - uncommon
INVESTIGATIONS
              
   Haematological indices.
   Microbiological diagnosis.
   Ascitic fluid analysis.
   New diagnostic tools-Adenosine deaminase, Gene
    amplification. Immunodiagnostic tests.

Imaging studies
 CXR- concomitant TB in less than 25% cases
 Barium studies .
 ultrasound and computed tomography.
Ascitic fluid analysis
                 
 •Gross Appearance:
    Straw coloured .

 EXUDATIVE

 WBC cell count- 500 and 1500 cells/mm3 – lymphocytosis.

 LDH raised-> 90 U/L

 Protein > 3g /dl.

 SAAG <1.1mg/dl

 RBC 7%.

   AFB stain +ve < 3 per cent of cases.

   positive culture is obtained in less than 20 per cent of cases
New diagnostic tools

 Adenosine deaminase.
                            
 rapid and non-invasive

 Purine-degrading enzyme

 Assists with maturation and differentiation of T-
  lymphoid cells.

 Raised- stimulation of T cells by the mycobacterial
 antigens.
Adenosine deaminase

 •Cut-off value of 30 U/L
   94% Sensitive
   92% Specific.
                        
FALSE VALUES-
 •In coinfection with HIV - normal or low.
 Falsely high values in malignant ascites.
 Gene amplification.- LCR & PCR in detecting AFB in
  tissues.

 serological tests-
                           
     - ELISA to detect IgG to a 43 kDa antigen of M.
tuberculosis found it to be highly sensitive.
   - High IFN-γ levels - detecting latent TB.


Elevated CA-125
 -Not sensitive
 Also raised in peritoneal
    carcinomatosis, ovarian malignancy.
 Can use to follow treatment response
Imaging studies
                       
in obtaining peritoneal biopsies




safer and inexpensive alternative to
diagnostic laparoscopy.



high diagnostic yield approaching
95%
 Ultrasound-

 superior to CT in revealing the multiple, fine, mobile
                            
septations within the ascitic fluid

1. fluid -free or loculated;(echogenic debris)
2. “Club sandwich” or “sliced bread” sign.
3. Lymphadenopathy- caseation and
                        calcification.
4. Bowel wall thickening .
5. Pseudokidney sign
COMPUTED TOMOGRAPHY-

   ascitic fluid has high attenuation values .

 •Peritoneum(white arrow)
   –Smooth and uniform thickening
   –If nodular, think Peritoneal
      Carcinomatosis.

 •Omentum(open arrow)
   –Smudged, omental cake or
     nodular..

 •Mesentery
   –Loss of normal mesenteric
      configuration
     -Thickened mesentery (>15 mm)
      with mesenteric lymph nodes- early
      sign

 •Lymphadenopathy.(black arrow)

DIAGNOSTIC TOOL
   OF CHOICE?
DIAGNOSTIC
LAPROSCOPY
    
DIAGNOSTIC YEILD
                         on the
specificity in excess of 96%
laparoscopic appearance alone.

With histological findings-sensitivity- 93%
                               specificity- 98%


Peritoneal biopsies should always be examined
whenever possible for culture and sensitivity. - gold
standard
LAP FINDINGS
           
Thickened peritoneum with tubercles
(66%)

thickened and peritoneum with
adhesions (21%);


fibro-adhesive type – with tubercles
and adhesions 13%.
PIT FALLS
                          
 Peritoneal carcinomatosis, sarcoidosis, starch
  peritonitis and Crohn's disease - MIMICK LAP
  FINDINGS.

 More expensive.
 Requires expertise.
 poor isolation of organism
 complications -bleeding, infection and bowel
  perforation

   ROLE OF
LAPAROTOMY?

 unnecessary




 with fibro-adhesive type of TBP when there is an
 indication for a peritoneal biopsy.

ideal diagnostic test
    requires the
 demonstration of
   mycobacteria
BUT…
                     
 characteristic laparoscopic appearance itself, even
 in the absence of bacteriological confirmation, would
 be sufficient grounds for the diagnosis of TBP.

 HIGH SPECIFICITY OF MACROSCOPIC
  APPEARANCE


TREATMENT


MEDICAL vs SURGICAL
UNCOMPLICATED
 solely pharmacological.
                          
 Four drug regimen:
–Isoniazid
–Rifampin
–Ethambutol
–Pyrazinamide.

 CAT I ATT
 Response to therapy is manifested by resolution of
  symptoms and disappearance of ascites

 Surgery is reserved for complications or uncertainty
 in diagnosis.

 MDR-TB not responsive to ATT.
DREADED
        COMPLICATION
             
ABDOMINAL COCOON SYNDROME-

 rare entity causing intestinal obstruction.

 Diagnosis done by imaging studies.

 Extensive bowel resection is associated with high morbidity.

 Symptomatic relief generally ensues following conservative
  surgery, although recurrence has been reported.




    ROLE OF
CORTICOSTEROIDS?

 four trials of adjuvant corticosteroids use in TBP and all
  of them cited modest benefit.

 Alrajhi et al.85 reported considerably low morbidity and
  complications in those treated with corticosteroids.

 pending need for prospective, well-controlled clinical
 trials with long-term follow-ups to identify the category
 of patients most likely to benefit from such therapy
Tuberculous peritonitis--
     do not miss it
          
 requires a high index of suspicion because of the
 subtle nature of the symptoms and signs.

 culture growth of the Mycobacterium remains the
 „gold standard‟ for diagnosis.

 It is essential to recognize that a combination of
 different diagnostic tests is used in order to arrive at
 the diagnosis of TBP

Laparoscopy, however,
remains the best means
   of diagnosing the
        disease

SOLID ORGAN
TUBERCULOSIS
HEPATIC TB
                
 the portal of entry :hematogenous dissemination
 miliary tuberculosis :hepatic artery
 focal liver tuberculosis :portal vein.

three forms
 diffuse hepatic involvement- most common
 granulomatous hepatitis
 focal/local tuberculoma or abscess- rare

 INVESTIGATIONS
   Percutaneous liver biopsy.

   laparoscopy liver biopsy- cheesy white irregular
    nodules.

   CT SCAN.
CT abdomen                  
 miliary micronodular with miliary calcifications

 Multiloculated cystic mass(cluster sign)

 MILIARY TB
   lesions are small 1 to 2 mm epitheloid granulomas.




 TUBERCULOMA
  Masses larger than 2mm in diameter
SPLENIC
            TUBERCULOSIS
•
                               or miliary form of the
    It can occur due to disseminated
    disease
•   Most commonly encountered in HIV pt(developed
    countries)
•   Fever, weight loss, diarrhea, left upper abdominal
    pain, splenomegaly
•   Investigations
•     Image-guided percutaneous needle biopsy is the gold
    standard for diagnosis.

      CECT-abdomen-multiple hypo echoic foci(<2cm)
Gross pathology of resected spleen showing innumerable caseating granulomas consistent
                                      with splenic tuberculosis.




               Mackowiak P A et al. Clin Infect Dis. 2011;52:418-420


The Author 2011. Published by Oxford University Press on behalf of the Infectious Diseases
 Society of America. All rights reserved. For Permissions, please e-mail:
 journals.permissions@oup.com.
Computed tomograph scan of the abdomen showing a spleen diffusely infiltrated by
                      small, hypodense lesions consistent with splenic granulomas.




                                       Mackowiak P A et al. Clin Infect Dis. 2011;52:418-420


The Author 2011. Published by Oxford University Press on behalf of the Infectious Diseases
 Society of America. All rights reserved. For Permissions, please e-mail:
 journals.permissions@oup.com.
PANCREATIC TB
           
 It is rare
 Often associated with miliary TB &
  immunocompromised pt
 Result from lymphohaematogenous dissemimation
  after pulmonary exposure
 Anorexia,malaise fever,weight loss,mass
 Investication: FNAC & BIOPSY (CT guided)

 CT enhanced conrast-
RENAL TB
                 
 Microscopic pyuria without bacteruria and with or
  without hematuria.

 Progression of the disease  urine culture may be
  +ve for tubercle bacilli.
 Cavitation of renal parenchyma may be seen.

 Standard anti TB therapy
Ovarian TB
                  
 Fallopian tubes are affected in 94% of women with
  genital tuberculosis.

 Salpingitis caused by hematogenous dissemination
 is almost always bilateral .

 A tubo-ovarian abscess that extends through the
  peritoneum into the extraperitoneal compartment
  suggests tuberculosis
Ovarian TB
 Tuberculous tubo-ovarian
  abscess

 (a) Contrast-enhanced CT
 scan shows a
 multiloculated mass with
 peripheral enhancement
 around centers .(arrow).




 (b) Coronal T2-weighted
  MR image (7,200/90) shows
  the abscess (arrows).

 A 24 yr old female comes with pain RIF, MANTRELS
  7/10 diagnosed as acute appendicitis.
 On opening an inflammed appendix is found but
  studded with tubercles, omentum and caecum show
  multiple tubercles
             Do we do appendicectomy ?

 Patient comes with features of perforation peritonitis
 On opening TB peritonitis with ileac perforation
  with a stricture of about 3 cm 2 feet distal to
  perforation
                    Primary closure?
                     Stricturoplasty?
                        Resection?

 A 60 yr old male, known case of pulmonary TB
  presenting with acute intestinal obstruction
 On opening ileocecal mass with peritonium and
  omentum showing features of TB
                 Rt hemicolectomy?
                  Limited resection?
                       Bypass?

 Patent known case of pulmonary TB , presenting
  with ascites and subacute obstruction.
 On diagnostic Lap we find Milliary TB with multiple
  adhesions
                Do we do adhesiolysis?
Appendicectomy
             
 Removing the appendix is a safe procedure even if
  microscopic evidence of tuberculosis is present
 Delay in treatment can cause significant morbidity


                                 •Singapore Med J 2011; 52(2) : 91
                                 •Abrams & Holden, 1964
Stricturoplasty/
             Resection
                
 Both procedures were equally effective and had
  equal morbidity in cases of intestinal tuberculous
  strictures.

             Zafar A et al ,Rawalpindi General Hospital, Rawalpindi

 Stricturoplasty is superior to resection anastomosis
  in cases of multiple strictures as it conserves gut
  length
 Stricturoplasty can even be performed safely in cases
  with coexistent gut perforation.
                 J Coll Physicians Surg Pak 2003 May;13(5):277-9
Stricturoplasty
                  
 Stricturoplasty is a simple, quick, and safe operative
  technique to manage tuberculous small intestinal
  strictures, in combination with limited resection or as
  a sole procedure
                                      Abrar Hussain Zaid et al


 Stricturoplasty is suggested in pyloroduodenal and
  ileocaecal lesions

                                        Katariya et al
Perforation primary closure?
                         
 The results of oversewing alone are poor
                                      Bhansali et al.,1968
 Resection anastomosis is the best method in
  treating perforations
        N.O. Aston and A.M. de Costa, Postgraduate Medical
                              Journal (1985) 61, 251-252
 In critically ill is oval excision of the perforated
  area with a transverse anastomosis reinforced by an
  omental patch
                                              Pujari, 1979

Resection Anastomosis
       Is it safe?





Annals of Surgery November 1964

 Two-stage procedures
 Reversal of stoma in a well-prepared gut with ATT
  cover




                                    Muhammad Saaiq et al

 Turkish Journal of Trauma & Emergency Surgery vol
  17 2011
 Rankie et al
 Recio et al
 Piechaud et al
 Asian J Surg 2002:25(2):145-8

 Resection is a safe and effective procedure in treating
  abdominal TB complications.

 Resection of a tuberculous lesion where feasible is
  the procedure of choice
How much to resect?
                
    With effective ATT limited and conservative
     resections give good results




•Journal of the College of Physicians and Surgeons Pakistan 2008, Vol. 18 (7): 393-396
•P Agarwal et al , BHJ 2000
Fistulas
                     
 Low output fistulas without distal obstruction
           ATT wait and watch
 High output fistulas
 Fistulas with distal obstruction
 Fistulas not responding to conservative management
           Surgery


                      Saudi J Gastroenterol. 2010 October; 16(4): 305.
Adhesiolysis / ATT
             
 Adhesive intestinal lesions may be relieved with
  antitubercular drugs alone without surgery.
      Anand et al
      Balasubramaniam et al
To summarise
                
 Tuberculous peritonitis once diagnosed is usually
  not a surgical disease.
 Resection of diseased segment is the best method
 Stricturoplasty and Resection anastomosis are safe
  procedures
 Limited resection is advised with ATT cover
 Chemotherapy has no substitute and is essential
  after surgery.


Thank You

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Abdominal Tuberculosis surgical aspects

  • 1.
  • 2.
  • 3.
  • 4.   40% of Indians harbour tb bacilli  In 2010, Global Incidence – 9.4million In india – 2.3million Prevalence in India is 3.1 million 3,20,000 deaths… -WHO
  • 5. TB declared as notifiable disease by INDIAN GOVERNMENT on may9th 2012 http://articles.timesofindia.indiatimes.com/2012-05- 09/india/31640562_1_mdr-tb-tb-cases-tb-diagnosis
  • 6.
  • 7. Risk Factors  Case series involving 60 patients  38% Cirrhosis   33% Renal Failure with Peritoneal Dialysis  27% Diabetes Mellitus  18% Underlying Malignancy  10% Systemic Corticosteroids  2% AIDS  12% No Risk Factors http://www.med.unc.edu
  • 8.
  • 9.
  • 10. 24th march 1882 World TB DAY
  • 12. STAGE 1 ESTABLISHMENT  ALVEOLAR MACROPHAGE INGESTS TB BACILLI
  • 13.  M. tuberculosis blocks phagolysosome formation by inhbiting Ca2+ signals and the recruitment and assembly of the proteins that mediate phagosome- lysosome fusion Fratti RA, et al. J cell Biol 2001
  • 14.   Racial differences in macrophages microbicidal enzymes. Africans have macrophages less capable of destroying tb bacilli.  Mutations in NRAMP-1 gene involved in pushing out Fe2+ ions from the phagolysosome. Cellier MF, et al. Microbes Infect 2007; 9:1662.
  • 15. STAGE 2 SYMBIOSIS  Tubercle bacilli ingested By non activated newly recruited Monocytes.
  • 16. STAGE 2 SYMBIOSIS   Incapable alveolar macrophage bursts.  New monocytes from blood are recruited to the site mainly by c5a, Monocyte Chemoattractant protein- 1(MCP-1)  TB bacilli multiplies in these non activated monocytes.  7-21 days (<3weeks) – primary TB.  Comes to an end when Th1 cells enters the site
  • 17. Secrete IFN γ Activates Macrophages T- CELL Kills the inactivated macrophages which were allowing the tb bacilli growth inside them…
  • 18. CMI or DTH??? Main difference is concentration of antigen required….
  • 19. STAGE 3 EARLY STAGES OF CASEOUS NECROSIS  Non activated Macrophages which allowed the growth of TB bacilli are killed by DTH mediated by T-cells Forming solid caseous necrosis
  • 20. up-regulation of ICAM-1, ELAM-1, VCAM-1, and other adhesion molecules Activated endothelial cells presents tuberculin like antigen to macrophage Leading to endothelial injury and its consequences J Leukoc Biol. 1996;60:692–703.
  • 21. DTH AND CMI  • T-CELLS DTH • DESTROYS INACTIVATED MACROPHAGES IN WHICH BACILLI MULTIPLIES • INITIALLY BENEFICIAL • MACROPHAGES and T-CELLS CMI • BACILLI MULTIPLYING INSIDE ACTIVATED MACROPHAGES ARE DESTROYED • BENEFICIAL TO THE HOST
  • 22. STAGE 3 EARLY STAGES OF CASEOUS NECROSIS  TB bacilli remains live but cannot multiply in solid caseous material. TB bacilli escaping from the edges of caseous necrosis are engulfed by macrophages and caseous centre enlarges.
  • 23. STAGE 4 INTERPLAY OF CMI AND DTH  ACTIVATED MACROPHAGES WALLS OFF THE EXPANDING CAVITY AND PREVENTS FURTHER INCREASE IN SIZE IN HOST WITH GOOD CMI.
  • 24. POOR CMI  IN HOST WITH POOR CMI DTH CONTINUES DESTROYS THE BACILLI AND LUNG TISSUE TOO. TB BACILL SPREADS THROUGH LYMPHATIC AND HEMATOGENOUS ROUTE TO OTHER ORGANS.
  • 25.
  • 26. STAGE 5 LIQUEFACTION AND CAVITY FORMATION  the large quantities of bacilli and their antigens in the liquefied caseum overwhelm a formerly effective CMI, causing progression of the disease and the destruction of local tissues, including the wall of an adjacent bronchus.
  • 27.  when the caseum liquefies, the entering macrophages do not function effectively.  Possibly, the entering macrophages are killed by toxic fatty acids originating from host cells, or the bacilli, or both.  CAUSE OF LIQUEFACTION??? REF: Hemsworth GR, Kochan I. Secretion of antimycobacterial fatty acids by normal and activated macrophages. Infect Immun. 1978;19:170–177.
  • 28.
  • 29. GENERAL INVESTIGATIONS  . Types of specimens: 1.Pulmonary specimens -Sputum -Gastric lavage -Transtracheal aspirations -Bronchoscopy -Laryngeal swabbing 2.Urine specimens 3.Tissue and body fluid specimens 4.Blood specimens 5.Wounds, skin lesions, and aspirates
  • 30. Microscopy  Sputum smears stained by Z-N stain   What is Smear Positivity  All patients who have submitted two Specimens and found to be positive for identification of AFB  Detecting AFB by fluorochrome stain using fluorescence microscopy
  • 31.  Culturing for isolation of Mycobacterium spp continues to be a Gold standard  Agar based 4-6weeks  egg based  BACTEC – 14.8days  MGIT- 13.3days
  • 32. NEWER METHODS   PCR SENSITIVITY-92% SPECIFICITY-99%  INTERFERON –γ release assays. QuantiFERON- TB SPOT TB SENSITIVITY-81% SENSITIVITY-87.5% SPECIFICITY-91.2% SPECIFICITY-86.3%
  • 34.   Epidemiology  Pathogenesis  Clinical features  Diagnosis
  • 35. Epidemiology   Upto 1% of hospital admissions  More common in immuno-suppressed  Isolated abdominal tuberculosis:  Unselected autopsy series- 0.02 - 5.1%  Higher prevalence in females in India (3:1–4:1)  Mainly disease of young adults  ~ 2/3 of pt. are 21-40 yr old
  • 36. TB & HIV   Incidence severity of abdominal TB will increase with the HIV epidemic  HIV – 50 % develop abdominal TB
  • 37. Pathogenesis   Mechanisms by which M. tuberculosis reach the GIT:  Hematogenous spread from primary lung focus  Ingestion of bacilli in sputum from active pulmonary focus.  Direct spread from adjacent organs.  Via lymph channels from infected LN  In India, organism from all intestinal lesions – M. tuberculosis and not M. bovis.
  • 38. Types   Ulcerative  Hyperplastic  Ulcerohyperplastic  Diffuse colitis  Sclerotic
  • 39. PATHOLOGY Most active inflammation in submucosa. Bacilli in depth of mucosal glands Inflammatory reaction Phagocytes carry bacilli to Peyers Patches Formation of tubercle Tubercles undergo necrosis
  • 40. PATHOLOGY  Submucosal tubercles enlarge Endarteritis & edema Sloughing Ulcer formation Accumulation of collagenous tissue Thickening & Stenosis
  • 41. PATHOLOGY  Inflammatory process in submucosa penetrates to serosa Tubercles on serosal surface Bacilli reach lymphatics Bacilli via lymphatics Lymphatic obstruction Regional lymph nodes of mesentery and bowel • Hyperplasia Thick fixed mass • Caseation necrosis • Calcification
  • 42. Order of Frequency  Ileum > caecum > ascending colon > jejunum >appendix > sigmoid > rectum > duodenum > stomach > oesophagus  More than one site may be involved
  • 43.   Bhansali - ileum involved in 102 and caecum in 100 of 196 pt.  Prakash - ileocaecal involvement in 162 of 300 pt.  Most common site - ILEOCAECAL REGION WHY?
  • 44.   Increased physiological stasis  Increased rate of fluid and electrolyte absorption  Minimal digestive activity  Abundance of lymphoid tissue at this site.
  • 45. Clinical features  Constitutional symptoms   Fever (40%-70%)  Weight loss (40%-90%)  Anorexia  Malaise  Pain (80%-95%)  Colicky (luminal stenosis)  Continous ( LN involvement)  Altered bowel habits
  • 46. Ileocecal TB   Colicky abdominal pain  Ball rolling in abdomen  Borborygmi  Right iliac fossa lump - ileocaecal region, mesenteric fat and LN
  • 47. Isolated Colonic TB   9.2% of all cases  Multifocal involvement in ~ 1/3 (28% to 44%)
  • 48. Anorectal TB   Hematochezia - most common symp. Due to mucosal trauma by stool  Constitutional symptoms  Constipation  Rectal stricture  Anal fistula – usually multiple
  • 49. Gastroduodenal TB  of total cases  Stomach and duodenum each ~ 1%  Mimics PUD - shorter history, non response to t/t  Mimics gastric Ca.  Duodenal obstruction - extrinsic compression by tuberculous LN  Hematemesis / Perforation / Fistulae / Obstructive jaundice  Cx-Ray usually normal  Endoscopic picture - non specific
  • 50. Esophageal TB   Rare ~ 0.2% of total cases  By extension from adjacent LN  Low grade fever / Dysphagia / Odynophagia / Midesophageal ulcer  Mimics esophageal Ca
  • 51. Complications   OBSTRUCTION  PERFORATION  MALABSORPTION
  • 52. Obstruction   Pathogenesis  Hyperplastic caecal TB  Strictures (napkin ring) of the small intestine  Adhesions  Adjacent LN involvement traction, narrowing and fixation of bowel loops.  In India ~ 3% to 20% of bowel obstruction (Bhansali and Sethna).
  • 53. Malabsorption  2nd most common cause in India  Pathogenesis  bacterial overgrowth in stagnant loop  bile salt deconjugation  diminished absorptive surface due to ulceration  involvement of lymphatics and LN 75% pt with intestinal obstruction 40% of those without (Tandon et al)
  • 54. Perforation   5%-9% of SI perforations in India  2nd commonest cause after typhoid  Usually single and proximal to a stricture  Clue - Chest x-ray,  Pneumoperitoneum in ~ 50% cases
  • 56.
  • 57.
  • 58. Intestinal TB cont.  CT scan shows thickening  of the cecum with pericecal inflammatory changes. Mesenteric lymph nodes are also evident (arrows).
  • 59. Endoscopy  Nodules   Variable sizes (2 to 6mm)  Non friable  Most common in caecum especially near IC valve.  Tubercular ulcers  Large (10 to 20mm) or small (3 to 5mm)  Located between the nodules  Single or multiple  Transversely oriented / circumferential contrast to Crohns  Healing of these ‘girdle ulcers’ strictures  Deformed and edematous ileocaecal valve
  • 60. Esophageal TB Nodules TB mass in stomach T.B. ulceration with narrow lumen
  • 62.   8 –10 Bx from ulcer edge  low yield on histopath as mainly submucosal disease  Granulomas in 8%-48%  Caseation in ~ 1/3 (33%-38%) of + cases  AFB stains - variable  Culture positivity in 40%  Combination of histology & culture diagnosis in 80% ( S K Sharma)
  • 63. Take home message   Ileocecal TB is the most common intestinal TB  Combination of histology & culture is necessary for diagnosis.  Surgery is the only answer
  • 64. AN OVERLOOKED DIAGNOSIS
  • 65. DIAGNOSTIC CHALLENGES  Non specific presentation Insidious presentation Mimicks malignancy Unhelpful labaratory tests
  • 67. EPIDEMOLOGY  6th most common extra pulmonary site Incidence- 0.1% to 0.7% worldwide Rising incidence sexes are equally affected 35 and 45 years of age.
  • 68. PATHOGENESIS  Activation of quiscent foci of infection(common) Direct spread –mesentric Lymph nodes –Intraabdominal organs •Hematogenous spread from –Primary pulmonary TB –Miliary TB
  • 70. CLINICAL PRESENTATION  wet-ascitic dry-plastic form(less fibrotic-fixed Encysted(loculated) (most common) common) • ascites •Mass formation • adhesions • localized • ±peritonitis •Matting of bowel • „doughy feel‟ abdominal swelling loops • tender abdominal masses.
  • 71. CLINICAL FEATURES  Case series involving 145 patients  73% Abdominal swelling (ascites) – most common  64% Abdominal pain  54% Fever and night sweats  44% Weight loss  18% both pulmonary & abdominal TB  Hepatomegaly and splenomegaly - uncommon
  • 72. INVESTIGATIONS   Haematological indices.  Microbiological diagnosis.  Ascitic fluid analysis.  New diagnostic tools-Adenosine deaminase, Gene amplification. Immunodiagnostic tests. Imaging studies  CXR- concomitant TB in less than 25% cases  Barium studies .  ultrasound and computed tomography.
  • 73. Ascitic fluid analysis   •Gross Appearance: Straw coloured .  EXUDATIVE  WBC cell count- 500 and 1500 cells/mm3 – lymphocytosis.  LDH raised-> 90 U/L  Protein > 3g /dl.  SAAG <1.1mg/dl  RBC 7%.  AFB stain +ve < 3 per cent of cases.  positive culture is obtained in less than 20 per cent of cases
  • 74. New diagnostic tools  Adenosine deaminase.   rapid and non-invasive  Purine-degrading enzyme  Assists with maturation and differentiation of T- lymphoid cells.  Raised- stimulation of T cells by the mycobacterial antigens.
  • 75. Adenosine deaminase  •Cut-off value of 30 U/L  94% Sensitive  92% Specific.  FALSE VALUES-  •In coinfection with HIV - normal or low.  Falsely high values in malignant ascites.
  • 76.  Gene amplification.- LCR & PCR in detecting AFB in tissues.  serological tests-  - ELISA to detect IgG to a 43 kDa antigen of M. tuberculosis found it to be highly sensitive. - High IFN-γ levels - detecting latent TB. Elevated CA-125 -Not sensitive Also raised in peritoneal carcinomatosis, ovarian malignancy. Can use to follow treatment response
  • 77. Imaging studies  in obtaining peritoneal biopsies safer and inexpensive alternative to diagnostic laparoscopy. high diagnostic yield approaching 95%
  • 78.  Ultrasound- superior to CT in revealing the multiple, fine, mobile  septations within the ascitic fluid 1. fluid -free or loculated;(echogenic debris) 2. “Club sandwich” or “sliced bread” sign. 3. Lymphadenopathy- caseation and calcification. 4. Bowel wall thickening . 5. Pseudokidney sign
  • 79. COMPUTED TOMOGRAPHY-  ascitic fluid has high attenuation values .  •Peritoneum(white arrow)  –Smooth and uniform thickening  –If nodular, think Peritoneal Carcinomatosis.  •Omentum(open arrow)  –Smudged, omental cake or nodular..  •Mesentery  –Loss of normal mesenteric configuration  -Thickened mesentery (>15 mm) with mesenteric lymph nodes- early sign  •Lymphadenopathy.(black arrow)
  • 80.  DIAGNOSTIC TOOL OF CHOICE?
  • 82. DIAGNOSTIC YEILD on the specificity in excess of 96% laparoscopic appearance alone. With histological findings-sensitivity- 93% specificity- 98% Peritoneal biopsies should always be examined whenever possible for culture and sensitivity. - gold standard
  • 83. LAP FINDINGS  Thickened peritoneum with tubercles (66%) thickened and peritoneum with adhesions (21%); fibro-adhesive type – with tubercles and adhesions 13%.
  • 84. PIT FALLS   Peritoneal carcinomatosis, sarcoidosis, starch peritonitis and Crohn's disease - MIMICK LAP FINDINGS.  More expensive.  Requires expertise.  poor isolation of organism  complications -bleeding, infection and bowel perforation
  • 85. ROLE OF LAPAROTOMY?
  • 86.   unnecessary  with fibro-adhesive type of TBP when there is an indication for a peritoneal biopsy.
  • 87.  ideal diagnostic test requires the demonstration of mycobacteria
  • 88. BUT…   characteristic laparoscopic appearance itself, even in the absence of bacteriological confirmation, would be sufficient grounds for the diagnosis of TBP.  HIGH SPECIFICITY OF MACROSCOPIC APPEARANCE
  • 91. UNCOMPLICATED  solely pharmacological.   Four drug regimen: –Isoniazid –Rifampin –Ethambutol –Pyrazinamide.  CAT I ATT  Response to therapy is manifested by resolution of symptoms and disappearance of ascites
  • 92.   Surgery is reserved for complications or uncertainty in diagnosis.  MDR-TB not responsive to ATT.
  • 93. DREADED COMPLICATION  ABDOMINAL COCOON SYNDROME-  rare entity causing intestinal obstruction.  Diagnosis done by imaging studies.  Extensive bowel resection is associated with high morbidity.  Symptomatic relief generally ensues following conservative surgery, although recurrence has been reported.
  • 94.
  • 95.
  • 96.
  • 97. ROLE OF CORTICOSTEROIDS?
  • 98.   four trials of adjuvant corticosteroids use in TBP and all of them cited modest benefit.  Alrajhi et al.85 reported considerably low morbidity and complications in those treated with corticosteroids.  pending need for prospective, well-controlled clinical trials with long-term follow-ups to identify the category of patients most likely to benefit from such therapy
  • 99. Tuberculous peritonitis-- do not miss it   requires a high index of suspicion because of the subtle nature of the symptoms and signs.  culture growth of the Mycobacterium remains the „gold standard‟ for diagnosis.  It is essential to recognize that a combination of different diagnostic tests is used in order to arrive at the diagnosis of TBP
  • 100.  Laparoscopy, however, remains the best means of diagnosing the disease
  • 102. HEPATIC TB   the portal of entry :hematogenous dissemination  miliary tuberculosis :hepatic artery  focal liver tuberculosis :portal vein.
  • 103.  three forms  diffuse hepatic involvement- most common  granulomatous hepatitis  focal/local tuberculoma or abscess- rare
  • 104.   INVESTIGATIONS  Percutaneous liver biopsy.  laparoscopy liver biopsy- cheesy white irregular nodules.  CT SCAN.
  • 105. CT abdomen   miliary micronodular with miliary calcifications  Multiloculated cystic mass(cluster sign)
  • 106.   MILIARY TB  lesions are small 1 to 2 mm epitheloid granulomas.  TUBERCULOMA Masses larger than 2mm in diameter
  • 107. SPLENIC TUBERCULOSIS •  or miliary form of the It can occur due to disseminated disease • Most commonly encountered in HIV pt(developed countries) • Fever, weight loss, diarrhea, left upper abdominal pain, splenomegaly • Investigations • Image-guided percutaneous needle biopsy is the gold standard for diagnosis. CECT-abdomen-multiple hypo echoic foci(<2cm)
  • 108. Gross pathology of resected spleen showing innumerable caseating granulomas consistent with splenic tuberculosis. Mackowiak P A et al. Clin Infect Dis. 2011;52:418-420 The Author 2011. Published by Oxford University Press on behalf of the Infectious Diseases Society of America. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.
  • 109. Computed tomograph scan of the abdomen showing a spleen diffusely infiltrated by small, hypodense lesions consistent with splenic granulomas. Mackowiak P A et al. Clin Infect Dis. 2011;52:418-420 The Author 2011. Published by Oxford University Press on behalf of the Infectious Diseases Society of America. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.
  • 110. PANCREATIC TB   It is rare  Often associated with miliary TB & immunocompromised pt  Result from lymphohaematogenous dissemimation after pulmonary exposure  Anorexia,malaise fever,weight loss,mass  Investication: FNAC & BIOPSY (CT guided)
  • 111.   CT enhanced conrast-
  • 112. RENAL TB   Microscopic pyuria without bacteruria and with or without hematuria.  Progression of the disease  urine culture may be +ve for tubercle bacilli.  Cavitation of renal parenchyma may be seen.  Standard anti TB therapy
  • 113.
  • 114. Ovarian TB   Fallopian tubes are affected in 94% of women with genital tuberculosis.  Salpingitis caused by hematogenous dissemination is almost always bilateral .  A tubo-ovarian abscess that extends through the peritoneum into the extraperitoneal compartment suggests tuberculosis
  • 115. Ovarian TB  Tuberculous tubo-ovarian abscess  (a) Contrast-enhanced CT scan shows a multiloculated mass with peripheral enhancement around centers .(arrow).  (b) Coronal T2-weighted MR image (7,200/90) shows the abscess (arrows).
  • 116.
  • 117.   A 24 yr old female comes with pain RIF, MANTRELS 7/10 diagnosed as acute appendicitis.  On opening an inflammed appendix is found but studded with tubercles, omentum and caecum show multiple tubercles Do we do appendicectomy ?
  • 118.   Patient comes with features of perforation peritonitis  On opening TB peritonitis with ileac perforation with a stricture of about 3 cm 2 feet distal to perforation Primary closure? Stricturoplasty? Resection?
  • 119.   A 60 yr old male, known case of pulmonary TB presenting with acute intestinal obstruction  On opening ileocecal mass with peritonium and omentum showing features of TB Rt hemicolectomy? Limited resection? Bypass?
  • 120.   Patent known case of pulmonary TB , presenting with ascites and subacute obstruction.  On diagnostic Lap we find Milliary TB with multiple adhesions Do we do adhesiolysis?
  • 121. Appendicectomy   Removing the appendix is a safe procedure even if microscopic evidence of tuberculosis is present  Delay in treatment can cause significant morbidity •Singapore Med J 2011; 52(2) : 91 •Abrams & Holden, 1964
  • 122. Stricturoplasty/ Resection   Both procedures were equally effective and had equal morbidity in cases of intestinal tuberculous strictures. Zafar A et al ,Rawalpindi General Hospital, Rawalpindi  Stricturoplasty is superior to resection anastomosis in cases of multiple strictures as it conserves gut length  Stricturoplasty can even be performed safely in cases with coexistent gut perforation. J Coll Physicians Surg Pak 2003 May;13(5):277-9
  • 123. Stricturoplasty   Stricturoplasty is a simple, quick, and safe operative technique to manage tuberculous small intestinal strictures, in combination with limited resection or as a sole procedure Abrar Hussain Zaid et al  Stricturoplasty is suggested in pyloroduodenal and ileocaecal lesions Katariya et al
  • 124. Perforation primary closure?   The results of oversewing alone are poor  Bhansali et al.,1968  Resection anastomosis is the best method in treating perforations  N.O. Aston and A.M. de Costa, Postgraduate Medical Journal (1985) 61, 251-252  In critically ill is oval excision of the perforated area with a transverse anastomosis reinforced by an omental patch  Pujari, 1979
  • 126.  Annals of Surgery November 1964
  • 127.   Two-stage procedures  Reversal of stoma in a well-prepared gut with ATT cover Muhammad Saaiq et al
  • 128.   Turkish Journal of Trauma & Emergency Surgery vol 17 2011  Rankie et al  Recio et al  Piechaud et al  Asian J Surg 2002:25(2):145-8
  • 129.   Resection is a safe and effective procedure in treating abdominal TB complications.
  • 130.   Resection of a tuberculous lesion where feasible is the procedure of choice
  • 131. How much to resect?   With effective ATT limited and conservative resections give good results •Journal of the College of Physicians and Surgeons Pakistan 2008, Vol. 18 (7): 393-396 •P Agarwal et al , BHJ 2000
  • 132. Fistulas   Low output fistulas without distal obstruction ATT wait and watch  High output fistulas  Fistulas with distal obstruction  Fistulas not responding to conservative management Surgery Saudi J Gastroenterol. 2010 October; 16(4): 305.
  • 133. Adhesiolysis / ATT   Adhesive intestinal lesions may be relieved with antitubercular drugs alone without surgery.  Anand et al  Balasubramaniam et al
  • 134. To summarise   Tuberculous peritonitis once diagnosed is usually not a surgical disease.  Resection of diseased segment is the best method  Stricturoplasty and Resection anastomosis are safe procedures  Limited resection is advised with ATT cover  Chemotherapy has no substitute and is essential after surgery.