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Hígado
Anatomy
• Cantlie’s line: separates the lobes. Line
between GB fossa and IVC
• Ligamentum Teres: carries obliterated
umbilical vein
• Foramen of Winslow:
– Anterior: portal triad
– Posterior: IVC
– Inferior: duodenum
– Superior: Liver
Anatomy
• Replaced right hepatic artery arises from the
SMA, travels posterolateral to CBD in Porta
Hepatis. Important in Whipples
• Replaced left hepatic artery arises from the
left gastric artery, travels through the
gastrohepatic ligament into the falciform
ligament. Important in Nissens
Blood Supply
• Portal vein 75% blood flow, 50% of O2
• Portal vein formed by confluence of SMV and
splenic
• Hepatic artery 25% blood flow, 50% O2
• Left HV segments II, III, IVa; right HV segments
VI, VII, VIII; middle HV segments IV and V;
caudate drains into IVC
Pyogenic liver abscess
• MCC biliary instrumentation, can also be from
strictures, stones or Portal venous spread via GI
infections (diverticulitis, appendicitis, perf ulcer)
• MC in right lobe, can be multiple
• MC organism: E. Coli
• Present: fever, chills, RUQ pain
• Elevated wbc, elevated t bili, elevated alk phos
• Dx via CTCT-contrast enhancing, well defined
masses with low density, US-hypoechoic lesions
• Tx: perc drainage and broad spectrum abx
Amebic Abscess
• Amebic: tropical travel, complication of
intestinal amebiasis (E. Histolytica), spread to
liver via portal vein, usually solitary
• Fever, RUQ pain, hepatomegaly
• Imaging: often solitary right lobe, CT: low
density with peripheral rim of edema,
• Serology: indirect hemagglutination
• Treatment: Metronidazole aka Flagyl
Echinococcal Cyst
• Caused by tapeworm
• Mediterranean/Middle East
• sheep→dogs→humans
• Fever, abdominal pain, jaundice, weight loss
• Serology: indirect hemagglutination, also if
they mention positive Casoni test
(intradermal injection of sterilized fluid from
hydatid cyst that results in a wheal response)
• Imaging: unilocular or complex lesion with
daughter cysts
• Rupture or leak from PC aspiration 
anaphylactic shock
• Tx: Albendazole
• PAIR (Puncture, Aspiration, Injection, Re-
Aspiration) for unilocular
• Surgical excision or deroofing and evacuation
for complicated cysts (ruptured cyst, biliary
fistula, multiseptated)
Simple Liver Cyst
• Thin walled cyst with water dense content
• True cyst, no malignant potential
• If symptomatic can do laparoscopic
marsupialization
• Ovarian stroma – cystadenoma and needs
resection
Benign Liver Lesions
• Hemangioma
• FNH
• Adenoma
Hemangioma
• Most common benign solid tumor
• Congenital
• Asymptomatic
• Women of childbearing age
• Kasabach-Merritt syndrome (consumptive
coagulopathy, CHF, DIC) in infants
Hemangioma
• Imaging:
– US: Hyperechoic, well-demarcated, increased
vascular flow
– CT: rim enhancing with central filling on delayed
imaging on arterial phase
– MRI: isodense on T1, Hyperdense on T2,
peripheral enhancement to central enhancement
– TC99 RBC study: highly specific/sensitive
– hypervascular
Hemangioma
• Avoid biopsy  bleed
• Conservative treatment
Focal nodular hyperplasia (FNH)
• Second MC liver tumor
• Due to polyclonal proliferation within liver
• No risk of malignant transformation and low
rupture risk
• Imaging:
– US: non-specific
– CT: central stellate scar on portal venous phase
– MRI: T1 and T2, early hyperdensity with gadolinium
– Tc 99 sulfur colloid scan: Enhancement due to bile
proliferation (FNH has Kupffer cells)
• Conservative treatment
Adenoma
• Oral Contraceptives, Anabolic Steroids
• Rupture risk: >5cm
• Risk of malignant transformation 5%
• Imaging:
– MRI/CT scan: hypodense
– Sulfur Colloid scan: cold, no uptake, because no
Kupffer cells in adenomas
Adenoma
• Treatment:
• Asymptomatic + <4cm
– Stop OCPs, repeat imaging, if regression then you are done
– Resection if no regression
• Symptomatic or >4cm
– Resect for malignancy and rupture risk
• Ruptured  angioembolization
Budd-Chiari Syndrome
• Occlusion of hepatic veins
• Women with hypercoagulable disorders
• Acute onset of ascites
• abdominal pain, ascites, hepatosplenomegaly
• Caudate lobe hypertrophy
• Best diagnostic test: Ultrasound
• Treatment: anticoagulation; surgical
portosystemic shunt
– Remember any shunt that uses the IVC or portal
vein makes transplant much more difficult
HCC
• Most common primary hepatic tumor
• Chronic Liver disease - hep B and Hep C; Can also
be alpha-1 antitrypsin, NAFLD, glycogen storage,
aflatoxin rash
• Clinical deterioration, painful hepatomegaly,
weight loss, anorexia
• AFP >400 diagnostic
• Cirrhotics need periodic imaging (US) and AFP
• No biopsy
• Fibromellar variant younger patients w/o
cirrhosis – best prognosis
HCC
• Surgical resection – 1 cm margins, need at least
25% healthy liver remnant
• Transplant (best results) – Milan criteria – one
tumor <5cm, 3 or fewer each less than 3cm, no
PV or IVC involvement; best option for Childs B+C
• Tumor ablation– ethanol, RFA, small tumors or as
bridge to transplant
• Embolization: transarterial chemoembolization
(TACE) – palliative or bridge to transplant, also for
large unresectable tumors
Intrahepatic Cholangiocarcinoma
• Related to PSC, clonorchis (flukes), cirrhosis
• Elevated alk phos, bili, GGT; normal ast/alt
• Many present painless jaundice
• Surgical resection only potential for cure
• Start with diagnostic laparoscopy since large
percentage have peritoneal mets
• Palliative if mets
Hepatic Angiosarcoma
• PVC, arsenic exposure
• Often unresectable, poor prognosis
Liver mets
• Mets to Primary ratio 20:1
• Intraop US = most sensitive for identifying mets in liver
• MCC colorectal mets
• Need to achieve r0 resection
• When combined chemotherapy 5yr survival 30-50%
• RFA in unresectable
• Contraindications for hepatic resection: celiac or
periarotic LN, carcinomatosis, unresectable
extrahepatic disease
• Monitor CEA levels
Acute Liver Failure
• Most common with hepatitis, liver toxins, drug toxicity
• Rapid hepatocellular decline, jaundice, coagulopathy,
encephalopathy
• High likelihood of infections
• Cerebral edema  uncal herniation
• Kings College Criteria for transplant: PT >100 seconds
or 3 of following: <10 or >40, non-A/non-B hepatitis,
jaundice >7days prior to encephalopathy, PT >50, bili
>17
• Supportive tx: prophy GI bleed, correct hypoglycemia,
ICP monitoring with interventions, urgent transplant
Chronic Liver Failure
• Hep B, Hep C, EtOH, NAFLD
• MELD score (t bili, INR, cr)
• Childs (Ascites, Bili, INR, albumin, encephalopathy)
• Variceal bleed- egd and banding, octreotide, B Blockers
(prophylactic)
• Lasix, spironolactone, pericentesis manage ascites
• TIPS –makes encephalopathy worse
• Abx to prevent SBP
• Lactulose, rifaximin if encephalopathy
• Hepatorenal syndrome – albumin, octreotide,
midodrine
Hepatic Encephalopathy
• Development of asterixis = sign of progression
• Tx: Lactulose acidifies colon, preventing
uptake of ammonia – titrate 2-3 stools/day
–Neomycin: gets rid of ammonia producing
bacteria
–Limit protein intake (<70g/day)
–Feed with branch chain Amino Acids (VIL-
valine, isoleucine, leucine)
• Metabolized by skeletal muscle
Hep B
• Serology Test for: HBsAg, HBeAg, Anti-HBs,
Anti-HBc
• 1st Ab to appear is IgM (anti-HBc)
• HBcAg is never found in serum
• HBeAG is a marker for active viral replication
• HBsAB is a marker for immunity or recovered
past infections
Portal HTN
• Hepatic venous pressure gradient >12
• Varices – esophagus, hemorrhoids,
periumbilical, veins of Retzius
• If esophageal bleed- abx, vasopressin,
octreotide, egd with banding; propranolol,
TIPS
Liver absite
Liver absite
Liver absite
Liver absite

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Liver absite

  • 2. Anatomy • Cantlie’s line: separates the lobes. Line between GB fossa and IVC • Ligamentum Teres: carries obliterated umbilical vein • Foramen of Winslow: – Anterior: portal triad – Posterior: IVC – Inferior: duodenum – Superior: Liver
  • 3.
  • 4.
  • 5.
  • 6. Anatomy • Replaced right hepatic artery arises from the SMA, travels posterolateral to CBD in Porta Hepatis. Important in Whipples • Replaced left hepatic artery arises from the left gastric artery, travels through the gastrohepatic ligament into the falciform ligament. Important in Nissens
  • 7. Blood Supply • Portal vein 75% blood flow, 50% of O2 • Portal vein formed by confluence of SMV and splenic • Hepatic artery 25% blood flow, 50% O2 • Left HV segments II, III, IVa; right HV segments VI, VII, VIII; middle HV segments IV and V; caudate drains into IVC
  • 8. Pyogenic liver abscess • MCC biliary instrumentation, can also be from strictures, stones or Portal venous spread via GI infections (diverticulitis, appendicitis, perf ulcer) • MC in right lobe, can be multiple • MC organism: E. Coli • Present: fever, chills, RUQ pain • Elevated wbc, elevated t bili, elevated alk phos • Dx via CTCT-contrast enhancing, well defined masses with low density, US-hypoechoic lesions • Tx: perc drainage and broad spectrum abx
  • 9.
  • 10.
  • 11.
  • 12. Amebic Abscess • Amebic: tropical travel, complication of intestinal amebiasis (E. Histolytica), spread to liver via portal vein, usually solitary • Fever, RUQ pain, hepatomegaly • Imaging: often solitary right lobe, CT: low density with peripheral rim of edema, • Serology: indirect hemagglutination • Treatment: Metronidazole aka Flagyl
  • 13.
  • 14. Echinococcal Cyst • Caused by tapeworm • Mediterranean/Middle East • sheep→dogs→humans • Fever, abdominal pain, jaundice, weight loss • Serology: indirect hemagglutination, also if they mention positive Casoni test (intradermal injection of sterilized fluid from hydatid cyst that results in a wheal response) • Imaging: unilocular or complex lesion with daughter cysts
  • 15. • Rupture or leak from PC aspiration  anaphylactic shock • Tx: Albendazole • PAIR (Puncture, Aspiration, Injection, Re- Aspiration) for unilocular • Surgical excision or deroofing and evacuation for complicated cysts (ruptured cyst, biliary fistula, multiseptated)
  • 16.
  • 17.
  • 18. Simple Liver Cyst • Thin walled cyst with water dense content • True cyst, no malignant potential • If symptomatic can do laparoscopic marsupialization • Ovarian stroma – cystadenoma and needs resection
  • 19.
  • 20. Benign Liver Lesions • Hemangioma • FNH • Adenoma
  • 21. Hemangioma • Most common benign solid tumor • Congenital • Asymptomatic • Women of childbearing age • Kasabach-Merritt syndrome (consumptive coagulopathy, CHF, DIC) in infants
  • 22. Hemangioma • Imaging: – US: Hyperechoic, well-demarcated, increased vascular flow – CT: rim enhancing with central filling on delayed imaging on arterial phase – MRI: isodense on T1, Hyperdense on T2, peripheral enhancement to central enhancement – TC99 RBC study: highly specific/sensitive – hypervascular
  • 23. Hemangioma • Avoid biopsy  bleed • Conservative treatment
  • 24.
  • 25. Focal nodular hyperplasia (FNH) • Second MC liver tumor • Due to polyclonal proliferation within liver • No risk of malignant transformation and low rupture risk • Imaging: – US: non-specific – CT: central stellate scar on portal venous phase – MRI: T1 and T2, early hyperdensity with gadolinium – Tc 99 sulfur colloid scan: Enhancement due to bile proliferation (FNH has Kupffer cells) • Conservative treatment
  • 26.
  • 27.
  • 28. Adenoma • Oral Contraceptives, Anabolic Steroids • Rupture risk: >5cm • Risk of malignant transformation 5% • Imaging: – MRI/CT scan: hypodense – Sulfur Colloid scan: cold, no uptake, because no Kupffer cells in adenomas
  • 29.
  • 30.
  • 31. Adenoma • Treatment: • Asymptomatic + <4cm – Stop OCPs, repeat imaging, if regression then you are done – Resection if no regression • Symptomatic or >4cm – Resect for malignancy and rupture risk • Ruptured  angioembolization
  • 32. Budd-Chiari Syndrome • Occlusion of hepatic veins • Women with hypercoagulable disorders • Acute onset of ascites • abdominal pain, ascites, hepatosplenomegaly • Caudate lobe hypertrophy • Best diagnostic test: Ultrasound • Treatment: anticoagulation; surgical portosystemic shunt – Remember any shunt that uses the IVC or portal vein makes transplant much more difficult
  • 33.
  • 34. HCC • Most common primary hepatic tumor • Chronic Liver disease - hep B and Hep C; Can also be alpha-1 antitrypsin, NAFLD, glycogen storage, aflatoxin rash • Clinical deterioration, painful hepatomegaly, weight loss, anorexia • AFP >400 diagnostic • Cirrhotics need periodic imaging (US) and AFP • No biopsy • Fibromellar variant younger patients w/o cirrhosis – best prognosis
  • 35. HCC • Surgical resection – 1 cm margins, need at least 25% healthy liver remnant • Transplant (best results) – Milan criteria – one tumor <5cm, 3 or fewer each less than 3cm, no PV or IVC involvement; best option for Childs B+C • Tumor ablation– ethanol, RFA, small tumors or as bridge to transplant • Embolization: transarterial chemoembolization (TACE) – palliative or bridge to transplant, also for large unresectable tumors
  • 36.
  • 37. Intrahepatic Cholangiocarcinoma • Related to PSC, clonorchis (flukes), cirrhosis • Elevated alk phos, bili, GGT; normal ast/alt • Many present painless jaundice • Surgical resection only potential for cure • Start with diagnostic laparoscopy since large percentage have peritoneal mets • Palliative if mets
  • 38. Hepatic Angiosarcoma • PVC, arsenic exposure • Often unresectable, poor prognosis
  • 39. Liver mets • Mets to Primary ratio 20:1 • Intraop US = most sensitive for identifying mets in liver • MCC colorectal mets • Need to achieve r0 resection • When combined chemotherapy 5yr survival 30-50% • RFA in unresectable • Contraindications for hepatic resection: celiac or periarotic LN, carcinomatosis, unresectable extrahepatic disease • Monitor CEA levels
  • 40. Acute Liver Failure • Most common with hepatitis, liver toxins, drug toxicity • Rapid hepatocellular decline, jaundice, coagulopathy, encephalopathy • High likelihood of infections • Cerebral edema  uncal herniation • Kings College Criteria for transplant: PT >100 seconds or 3 of following: <10 or >40, non-A/non-B hepatitis, jaundice >7days prior to encephalopathy, PT >50, bili >17 • Supportive tx: prophy GI bleed, correct hypoglycemia, ICP monitoring with interventions, urgent transplant
  • 41. Chronic Liver Failure • Hep B, Hep C, EtOH, NAFLD • MELD score (t bili, INR, cr) • Childs (Ascites, Bili, INR, albumin, encephalopathy) • Variceal bleed- egd and banding, octreotide, B Blockers (prophylactic) • Lasix, spironolactone, pericentesis manage ascites • TIPS –makes encephalopathy worse • Abx to prevent SBP • Lactulose, rifaximin if encephalopathy • Hepatorenal syndrome – albumin, octreotide, midodrine
  • 42. Hepatic Encephalopathy • Development of asterixis = sign of progression • Tx: Lactulose acidifies colon, preventing uptake of ammonia – titrate 2-3 stools/day –Neomycin: gets rid of ammonia producing bacteria –Limit protein intake (<70g/day) –Feed with branch chain Amino Acids (VIL- valine, isoleucine, leucine) • Metabolized by skeletal muscle
  • 43. Hep B • Serology Test for: HBsAg, HBeAg, Anti-HBs, Anti-HBc • 1st Ab to appear is IgM (anti-HBc) • HBcAg is never found in serum • HBeAG is a marker for active viral replication • HBsAB is a marker for immunity or recovered past infections
  • 44. Portal HTN • Hepatic venous pressure gradient >12 • Varices – esophagus, hemorrhoids, periumbilical, veins of Retzius • If esophageal bleed- abx, vasopressin, octreotide, egd with banding; propranolol, TIPS

Editor's Notes

  1. 5. Puncture under US guidance with or without catheter 6. Aspiration of cyst fluid (10-15 cc) a. If protoscolices are absent and/or antigen detection negative:  i. if clinical and epidemiological data, and biochemical fluid data are negative  stop procedure (probably non-parasitic cyst) (non-parasitic cysts are treated with alcohol injection only when symptomatic) ii. if clinical and epidemiological data, and biochemical fluid data are positive  proceed to next steps b. If protoscolices are present:  continue PAIR procedure 7. Intracystic injection of contrast medium and cystography 8. a. if communication with bile ducts:  stop the procedure; contrast medium may be left in the cyst as a substitute of protoscolicide b. If no communication with bile ducts:  inject 95% ethanol solution or hypertonic saline (1/3 of the amount of aspirated fluid) 9. Reaspiration of alcohol solution after 5 minutes 10. New parasitological control (to check protoscolex viability; eosin or methyl blue staining
  2. Kasabach-Merritt: giant hemangioma, thrombocytopenia, and consumptive coagulopathy
  3. Very esoteric If IVC patent/no gradient: mesocaval or side to side portocaval shunt If IVC occluded or gradient >20 mmHG, then mesoatrial shunt using graft If Chronic, only real treatment is transplant
  4. primary sclerosing cholangitis (PSC)
  5. Not Aromatic Amino Acids (PTT- phenylalanine, tyrosine, tryptophan) Rifaximin can be used in chronic liver failure to decrease risk of acute hepatic encephalopathy episodes and severity of encheph