The document discusses the meticulous techniques and considerations involved in thyroidectomy, emphasizing the importance of preserving the recurrent laryngeal nerve and parathyroid glands during surgery. It outlines the surgical anatomy, preparation, operative procedure, types of thyroidectomy, and complications, while also highlighting historical contributions to the surgical field. Additionally, it includes detailed descriptions of relevant anatomical triangles, patient preparation strategies, and the significance of various anatomical structures related to thyroid surgery.

1. THYROIDECTOMY
“Arenditionforpreservation”
DR. SIDDHARTH JINDAL
PG-3RD YEAR [SU-1]
DEPARTMENT OF SURGERY
P.D.U. GOVT. MEDICAL COLLEGE, RAJKOT
30-09-2021
1

2. ”
“The most important thing about
thyroidectomy is the meticulous
dissection needed for Preserving
The Two Nerves And Bilateral
Parathyroid Glands
Thus, rendition of a symphony
30-09-2021
2

3. CURTAIN RAISER
1. Surgical Anatomy What We Already Know.
2. Triangles In Thyroid Surgery Geometrical Nexus In The Neck!
3. Appreciation of the Historical Contributions
4. Types of Thyroidectomy
5. Patient Preparation for The Surgery
6. Operative Procedure
7. Complications
8. Recent Advances
9. Summary
10. Thyroid trivia
11. Q&A
30-09-2021
3

4. SURGICAL ANATOMY
 OVERVIEW OF THE GLAND
 VASCULAR SUPPLY
 INNERVATION & LYMPHATIC SUPPLY
 RELATIONS
 MUSCLES TO KNOW
 MISC. FACTS
30-09-2021
4

5. OVERVIEW OF THE GLAND
30-09-2021
5

6. VASCULAR
SUPPLY
30-09-2021
6

7. VASCULAR SUPPLY
ARTERIAL
1. Superior thyroid artery
2. Inferior thyroid artery
3. Thyroid ima artery [3-10%]
4. Accessory thyroid arteries
[arise from tracheal & esophageal
arteries]
VENOUS
 Superior thyroid vein
 Middle thyroid vein [LIGATED FIRST, IF + ]
 Inferior thyroid vein
[fuse-thyroidea ima—Lt. BCV]
 Kocher's’ 4th thyroid vein – occasionally b/w
middle and inferior thyroid veins, joins
IJV/MTV/ITV
ANTERIOR JUGULAR VEINS: descends vertically in
sup. Fascia, at 2.5cm above sternum , pierces
deep fascia to enter suprasternal space.
Its not related to venous drainage of the gland.
30-09-2021
7

8. 30-09-2021
8

9. LYMPHATICS
30-09-2021
9
Lymphatic Drainage:
Primary: Delphian, pretracheal,
paratracheal, esophageal and
mediastinal
Secondary: Deep cervical,
Supraclavicular and occipital

10. 30-09-2021
10

11. INNERVATION
30-09-2021
11
Sympathetic:
Mainly: superior & middle cervical ganglion
Partly: inferior cervical ganglion
Parasympathetic: CN X

12. 30-09-2021
12

13. THYROID’S
INTIMACY
WITH VAGUS
1. Superior thyroid artery is
accompanied by ELN
2. RLN runs in the
tracheo-esophageal groove
near the posteromedial surface
close to the thyroid gland;
• nerve lies b/w the branches of
inferior thyroid artery ~ 50% on
right side;
• on left side nerve lies posterior to
the Inferior thyroid artery in ~50%
30-09-2021
13

14. 30-09-2021
14

15. 30-09-2021
15

16. MUSCLES
Anterior aspect of neck
 Supra-hyoid muscles
1. Stylohyoid
2. Geniohyoid
3. Mylohyoid
Infrahyoid - STRAP MUSCLES
1. Sternohyoid- in front
2. Omohyoid- in front
3. Sternothyroid- deep to above m/s
4. Thyrohyoid- deep to above m/s
Mnemonic: TOSS
30-09-2021
16

17. 30-09-2021
17

18. TUBERCLE OF ZUCKERKANDL [Misc.]
 TZ is postero-lateral projection from the thyroid lobe resulting at a point where lateral and the
medial components fuse.
 Applied importance:
1. Grade 3 TZ: significant pressure symptoms, persistent after subtotal thyroidectomy
2. Intimately assoc. with RLN & Superior parathyroid. Enlargement occurs lateral to RLN—
The nerve appears to pass into a cleft medial to the enlarged tubercle.
3. Elevation of TZ: safe dissection; RLN passes medially through tunnel
4. The widened pre-vertebral space on X-ray of neck: (?) enlarged TZ [grade 2/3]
30-09-2021
18

19. Grading of TZ
Grade I <0.5cm
Grade II 0.5-1.0 cm
Grade III >1cm
30-09-2021
19

20. 30-09-2021
20

21. 30-09-2021
21
TRIANGLES IN THYROID SURGERY

22. BEAHR’S TRIANGLE
[RIDDLE’S]
USED TO IDENTIFY RLN CLOSE TO TEG
BOUNDARIES:
RLN [LOWER ARM]
INFERIOR THYROID ARTERY [SUPERIOR]
COMMON CAROTID ARTERY [BASE]
30-09-2021
22

23. LORE’S
TRIANGLE
IDENTIFICATION OF RLN INFERIORLY
BOUNDARIES:
MEDIAL: Medial border is formed by
trachea and esophagus
LATERAL: CCA
SUPERIOR: Surface of inferior pole of
thyroid gland
30-09-2021
23

24. SIMON’S
TRIANGLE
IDENTIFICATION OF RLN
BOUNDARIES
ANTERIOR: RLN
POSTERIOR: CCA
BASE: CRICOTHYROID
SUPERIORLY CROSSED BY
INFERIOR THYROID ARTERY
30-09-2021
24

25. RLN TRIANGLE
Inverted Triangle--
Apex: inferiorly: thoracic inlet
Medially: trachea
Laterally: medial edge of retracted
strap muscle
Superiorly: lower edge of inferior pole
of the gland
RLN exits as single trunk here
@ thoracic inlet
30-09-2021
25

26. TRIANGLE OF
CONCERN
COMMONEST SITE FOR BLEEDING IN
THYROIDECTOMY
Boundaries
Medial: trachea
Lateral: RLN
Base: thyrothymic ligament and loose fat
above sternum/
SMALL BRACNHES OF INFERIOR THYROID
ARTERY
30-09-2021
26

27. JOLL’S TRIANGLE
[STERNOTHYROLARYNGEAL
TRIANGLE]
FOR IDENTIFICATION OF ESLN [LIES WITHIN]
BOUNDARIES:
FLOOR: CRICOTHYROID
SUPERIORLY: STRAP MUSCLES
LAT BORDER: SUP THYR. VESSELS & UPPER
POLE OF THYROID
30-09-2021
27

28. CRICOTHYROID
SPACE OF REEVES
• Avascular plane b/w upper pole
of thyroid & cricothyroid muscle.
• Identification and opening:
important– preservation of EBSLN
• DOWNWARD & OUTWARD
TRACTION: JOLL’S TRIANGLE
30-09-2021
28

29. 30-09-2021
29

30. 30-09-2021
30

31. Down the memory lane…
 1912: KOCHER first thyroid surgery
 Billroth, Kocher, Joll , Lahey and Galen: importance of laryngeal nerve preservation in thyroid
surgeries.
 Illustration & description of nerves: Leonardo Di Vinci and Vesalius
 20th century: Russian: Alexander Borbov: routine visual identification of nerves
 George Crile: region of RLN , “no man’s land”
 1935: Amelia Galli-Curci, famous opera singer [soprano], underwent a disastrous thyroid surgery,
EBSLN damaged.
 Indian contribution: Sushruta [6th century B.C.] First to describe injury to neck at angle of jaw
voice hoarseness [? blood vessels]
 Rufus and Ephesus: hoarseness was due to nerve injury and not vascular injury
30-09-2021
31

32. 30-09-2021
32
TYPES OF THYROIDECTOMY

33. 30-09-2021
33

34. 30-09-2021
34

35. 30-09-2021
35

36. 30-09-2021
36

37. 30-09-2021
37

38. 30-09-2021
38

39. 30-09-2021
39

40. 30-09-2021
40

41. WORKUP
1. DL/IDL: VC check
2. CECT/MRI/intra-luminal imaging: potentially more advanced and regional disease
3. XRC [PA]- Retrosternal goiter
4. Decrease vascularity and risk of thyroid storm: anti-thyroid medications, beta blockers, lugol’s iodine [SSKI]
5. Rx of Beta-Blockers: continued for 7-10 days post-op because of longer t ½ of T4
6. MTC: r/o Phaeochromocytoma and MEN syndromes
7. Serum Calcium & PTH assay
8. In c/o thyroidectomy for solitary thyroid nodule, workup
 TFT- serum TSH [higher TSH is an independent risk factor for malignancy]
 USG, Radionuclide scintigraphy
 FNAC
 Thyroid suppression therapy 30-09-2021
41

42. 1. Adequately consented
2. North facing endotracheal tube, so that it doesn’t interfere with surgical field.
3. LA – to help hemostasis while raising flaps; aids in post-op analgesia.
4. Neuromonitoring
5. Surgical aids: loops, microscope, fine bipolar forceps, ligaclips
6. Mild hypotensive anesthesia should be used but reversed before the procedure is
completed.
30-09-2021
42

43. 30-09-2021
43

44. 30-09-2021
44

45. 30-09-2021
45

46. 30-09-2021
46

47. 30-09-2021
47

48. 30-09-2021
48

49. 30-09-2021
49

50. 30-09-2021
50

51. 30-09-2021
51

52. INDICATIONS OF THYROIDECTOMY
1. Congenital abnormalities
2. Goiter
3. Hyperthyroidism
4. Selected solitary thyroid
nodules
5. Thyroid carcinomas
30-09-2021
52

53. DTC: TOTAL OR PARTIAL
 Tumour at least 4cm
 Gross extra-thyroidal extension
 e/o metastasis
 Radiation induced DTC
 Familial nonmedullary thyroid cancer
 Multifocal bilateral DTC
30-09-2021
53
TOTAL THYROIDECTOMY

54. 30-09-2021
54
OPERATIVE PROCEDURE

55. OPERATIVE STRATEGY
1. Preserving Superior Laryngeal nerve
2. Preserving and identifying RLN
3. Preserving bilateral Parathyroid glands
4. Adequate hemostasis
30-09-2021
55

56. METICULOUS DISSECTION
Preserving Superior
Laryngeal nerve
Each branch of superior thyroid
vessels is isolated, ligated and
divided individually at the point
where it enters the thyroid gland.
Preserving and
identifying RLN
Knowing the course and
anatomic variants
Parathyroid
preservation
• Familiarity with anatomic
location
• Inferior: fat surrounding inferior
thyroid vessels
• Superior: poster lateral to RLN
• Preserve posterior thyroid
capsule
• Divide inferior thyroid, distal to
origin of blood supply to
parathyroid.
30-09-2021
56

57. POSITIONING
• Supine
• Semi-fowler’s position
• Neck extended
Shoulder roll
• Head supported by donut pillow
Allows anterior mobilization of the
visceral compartment.
r/o cervical spine ds.
Pre-op antibiotics- no need
Draping- double towel
30-09-2021
57

58. INCISION
KOCHER COLLAR INCISION
1. 1 fingerbreadth below cricoid anterior arch.
2. 2 fingerbreadths above suprasternal notch.
3. Incision in or parallel to normal crease: good post-op
cosmesis.
4. Stretching it to a silk ligature over the planned incision site
facilitates marking a balanced skin incision.
5. Incision should be in midline.
6. Incision too low, in women with larger breasts, descend
into sternum, high chance of keloid formation.
7. Length : adequate for mobilisation
8. Larger incisions: larger lesions/short or heavy necks/low
set larynx
30-09-2021
58

59. 30-09-2021
59

60. SURGICAL OUTLINE
o Ventral to Dorsal Approach
o Inferior Pole Dissection
o Berry’s Ligament Dissection
o Superior Pole Dissection
o Isthmusectomy
o Contralateral Surgery
o Closure
30-09-2021
60

61. RAISING THE SUB-PLATYSMAL FLAPS
30-09-2021
61

62. 30-09-2021
62

63. STRAP MUSCLES & MIDLINE AIRWAY
1. Palpate thyroid cartilage prominence midline
2. Make an incision through cervical fascia in the midline and extend the incision to
expose the full length of the strap muscles. [sternothyroid & sternohyoid]
3. Elevate sternohyoid muscle in midline.
4. Elevate sternothyroid muscle and dissect the thyroid capsule away from it on both sides.
5. This permits adequate digital exploration of entire thyroid gland.
6. Most cases, retract strap m/s: laterally, retract thyroid lobe in opp. direction
7. If gland is unusually large: transect sternothyroid muscle [laryngeal part] in upper third
[Why?]
30-09-2021
63

64. 30-09-2021
64

65. STAP MUSCLES- DIVISION- YES OR NO?
 If lateral retraction of the strap m/s doesn’t provide adequate exposure,
they should be divided without hesitation.
 Maneuver can helpful not only when thyroid lesion is large but also, when
• Thyroid and larynx are low set
• Barrel chested males in c/o COPD
30-09-2021
65

66. 30-09-2021
66

67.  True thyroid capsule has large capsular vessels, which cause significant
bleeding, if handled aggressively.
 Pyramidal lobe: inferior most portion of the embryological remnant of the
thyroglossal duct tract. 30-40%
 Look for Delphian lymph nodes in this area.
30-09-2021
67

68. 30-09-2021
68

69. 30-09-2021
69
 Loose connective tissue after division/retraction of strap
muscles
 Its between true capsule of thyroid and straps
 It’s the false thyroid capsule/peri-thyroidal sheath
 Represents: pre-tracheal portion of the middle or visceral
layer of the deep cervical fascia
 Cauterize occasional vessels which are undersurface of
the straps, arising from the true capsule after individual
identification.
 True thyroid capsule bluntly dissected digitally

70. KOCHER’S “medial dislocation of the GOITRE”
30-09-2021
70

71.  Lateral thyroid region is opened up by division of middle thyroid vein
 Ligate Middle Thyroid Vein, if +
 Retract laterally:
 Strap muscles
 Carotid sheath to some extent
 SCM
 Medial retraction of the thyroid gland and Laryngotracheal complex
exposes the parathyroids and RLN
 Tip: Gauze and digital retraction works best, avoid instruments that
penetrate the thyroid such as the Lahey’s clamp
30-09-2021
71

72. CAPSULAR
DISSECTION
 Preserving the two
nerves
 Preserving the two
parathyroid
30-09-2021
72

73. INFERIOR POLE DISSECTION
 Dissection of inferior pole related veins
 Inferior parathyroid identified
 Inferior parathyroid swept away and preserved with dissection being medial to upper cranial
aspect of the inferior parathyroid gland
 Ideally: inferior parathyroid marked with a small surgical clip, reflected inferiorly & laterally
before one searches for the RLN.
30-09-2021
73

74. 30-09-2021
74

75. 30-09-2021
75

76. 30-09-2021
76

77. RLN & Inferior Thyroid artery
• Several approaches
• Triangles [mentioned earlier]
• Thoracic inlet in the RLN Triangle: advantage single nerve trunk [prior to branching]
• Most extra-laryngeal nerves are superior, once its crossed the inferior thyroid artery.
• If found at inferior location, avoid tracing the entire course
• Identify inferior thyroid artery
• Inferior thyroid artery and RLN- intimate foreplay, relations described earlier
• Its typically deep to the artery
• Relationship varies from side to side
• Identification of ITA not only helps in identification of the RLN but also the parathyroid.
30-09-2021
77

78. 30-09-2021
78

79. ULTRALIGATION OF THE PARATHYROID VESSELS
30-09-2021
79

80. 30-09-2021
80

81. LIGAMENT OF BERRY : the Thyroid Hilus
30-09-2021
81

82. DISSECTION AT LIG. OF BERRY
 Challenging
 Indiscriminate cautery and clamping- neural injury
 RLN should be dissected and visualized up until it disappears from the surgical field by
entering the inferior most fibers of the inferior constrictor muscle lateral to the cricothyroid
m/s at the lower edge of the lateral cricoid cartilage k/a laryngeal entry point
 RLN should be in constant view during retraction.
Lig. of Berry – if post component + to RLN, judicious thyroid lobe retraction conveyed to the
nerve upward bowing of the nerve; transient neuropraxia
30-09-2021
82

83. 30-09-2021
83

84. SUPERIOR POLE & SLN
1. Why now? Greater lobe mobilization
2. Superior pole vessels are dissected, downwards mobilization using mayo
clamp.
3. Superior pole parenchyma facilitating downward retraction.
4. Final segment of RLN identified with ease
5. Better accessibility: sternothyroid transection, and medial retraction of the
complex
6. Laryngeal head of the sternothyroid muscle as It inserts on the oblique line
of thyroid cartilage of the larynx, robust indicator of EBSLN, as it runs down
just posterior on the inferior constrictor muscle on the lateral edge.
30-09-2021
84

85. 30-09-2021
85

86. CERNEA CLASSIFICATION
30-09-2021
86

87. • Superior pole vessels should
be taken individually to
optimize their control
 Avoids risk to EBSLN
• Posterior branches of superior
thyroid artery may contribute
to the blood supply of the
superior parathyroid , should
be reflected posteriorly &
maintained
30-09-2021
87

88. 30-09-2021
88

89. IDENTIFICATION OF SUP PARATHYROID
30-09-2021
89

90. 30-09-2021
90

91. ISTHMUS
 Can be divided easily
 Any point of thyroidectomy
 Generally, divided at the junction with the contralateral lobe opposite to tumor
30-09-2021
91

92. BEFORE CLOSURE
1. If appropriate, lobectomy specimen  frozen section.
2. Examine neck for nodes [jugular III/IV]
3. Inspect for parathyroid glands
4. Lee found that 11% of 414 thyroidectomy specimens had parathyroid
5. Any presumptive parathyroid should be biopsied for confirmation and then autotransplanted.
30-09-2021
92

93. FINAL CLOSURE
1. Assess for hemostasis on thyroid bed, strap m/s and airway
2. Ask anesthetist to give cycles of PPV, assess for bleeders, if any
3. Proper wash
4. Drains are infrequently needed, individual choice
5. With large dead space, extensive dissection and strap muscle tansection; drainage may be
appropriate, 15 Fr JP drain.
6. 3-0 absorbable suture, re-approximate strap muscles
7. Close platysma with absorbable sutures
8. Skin: subcuticular stitches
9. Remove dressings after 2 weeks.
30-09-2021
93

94. THYROID BED UPTAKE AFTER TOTAL
LOBECTOMY
LIG OF BERRY
Most common
Close relationship with RLN
PYRAMIDAL LOBE
Must be sought and dissected
superiorly to the level of notch in
the thyroid cartilage
SUP. POLE
More tapered
More bullous
Clamps should be placed high to
encompass
Don’t mass ligate the superior pole
Ligate individually.
30-09-2021
94

95. POST-OP CARE
Tracheomalacia- on extubation
1. Position: 45 degrees head up for first hours post-op
2. Steroid therapy [i/v] in first 24 hours [analgesia + reduces trans neuropraxia]
3. Antibiotic prophylaxis + analgesia
4. Early mobilization
5. Resume oral intake: complete consciousness, within 4 hours
6. Drain removal <20ml/24h or <10ml/8h
7. Calcium management
8. Post-op VC check
9. Venous thromboembolism prophylaxis: within 24h till discharge
30-09-2021
95

96. 30-09-2021
96

97. HAEMORRHAGE [1%]
1. Slippage of ligatures
2. Ppt by vigorous coughing or retching in post op period
3. S/S: tachycardia, breathlessness, hypotension
4. Progressive tension hematoma under strap muscles
5. Bedside removal of skin & deeper sutures
6. Later shift to OT and assess
7. BT (sos)
30-09-2021
97

98. RESPIRATORY OBSTRUCTION
 Hematoma– evacuate
 Laryngeal edema
 Tracheomalacia
 Bilateral RLN palsy [fibre-optic laryngoscopy]
30-09-2021
98

99. RLN PALSY
UNILATERAL
 Median/paramedian
 + SLN Palsy: cadaveric position
 Rx : speech therapy, Teflon inj
BILATERAL
 Median/ paramedian
 Most dangerous
 Voice change, severe dyspnea
 Airway block respiratory arrest
 Rx: emerg tracheostomy
30-09-2021
99

100. HYPOPARATHYROIDISM
• Clinical assessment for HYPOCALCEMIA [clinical signs]
• Asymptomatic: no Rx
• Symptomatic hypocalcemia: Treat with P/O- I/V [Calcium prepn]
• Need for supplementation > 6 months: permanent hypoparathyroidism
• After 2 months: try weaning off from oral calcium and re-assess.
30-09-2021
100

101. THYROID STORM/CRISIS
 Unusual
 In thyrotoxic patients, inadequately prepared
 Happens due to stress or operations
 Mortality ~ 50%
 Tachycardia, hyperpyrexia, cardiac collapse, altered mental status, hypotension,
severe dehydration, tremors and nausea
30-09-2021
101

102. 30-09-2021
102

103. HUNGRY BONE SYNDROME
1. Pts with pre-op hyperthyroidism
2. Increased bone breakdown in their hyperthyroid state
3. After surgery  bone breakdown over, “hungry” for calcium
4. Remove calcium from plasma rapidly, Sr. ALP rises
5. HypoCa, HypoPO4, HypoMg, HyperK ECG changes +
6. Hyperkalemia: urgent treatment
7. Magnesium infusion needed.
8. Rx: Vit D3 + Calcium supplentation for 6 months
30-09-2021
103

104. EBSLN INJURY
 Mostly unnoticed, more common [as compared to RLN palsy]
 Unless professionals [singers, teachers]
 Diagnose with fiber-optic laryngoscope
 Bowing of VC on paretic side
 Videostroboscopy : Assymetric mucosal traveling wave
 laryngeal EMG: denervation to cricothyroid muscle
 Rx : speech therapy
30-09-2021
104

105. NERVE INJURIES IN THYROID SURGERY
I. EBSLN injury- not life threatening. Will just lead to
hoarseness
• Inability to sing a high pitch: cricothyroid
II. U/L RLN injury: hoarseness
I. B/L RLN injury- airway obstruction, stridor [emergency]
30-09-2021
105

106. OTHER COMPLICATIONS
1. Hypothyroidism: supplement levothyroxine
2. Infection antibiotics
3. Recurrent thyrotoxicosis: more common with subtotal thyroidectomy
4. Seroma formation
30-09-2021
106

107. 30-09-2021
107
RECENT
ADVANCES

108. MINIMALLY INVASIVE THYROIDECTOMY
1. Mini incision-open
2. Video assisted
3. Complete endoscopic thyroidectomy
 Robotic assistance- da vinci system
-trans axillary: initial issues of brachial plexus injury, trachea-esophageal injury, heamatoma
-supraclavicular
-sub-clavicular
4. NOTES- zero cases of RLN injury, through Oral vestibule
Adv: less tissue trauma, less pot-op pain, improved cosmesis, short stay
C/I: Prior neck surgery, advanced stage cancers, size > 50 ml, nodule > 30 mm, h/o thyroiditis
30-09-2021
108

109. 30-09-2021
109

110. INTRA-OPERATIVE NEUROMONITORING
 IONM systems for RLN/X: electrical stimulation– EMG signal at VC
 Detected by electrodes embedded in ET tube
 All IONM: Intermittent direct stimulation, before & after thyroid surgery
 Continous stimulation of vagus monitor, during dissection
 Some developed countries, mandatory
30-09-2021
110

111. 30-09-2021
111

112. FLUROSCENT IMAGING AIDS FOR
PARATHYROID IDENTIFICATION
1. Critical for prevention of hypoparathyroidism
2. Detects fluorescence from parathyroid glands
3. Parathyroid tissue auto-fluoroscence in the near infra-red spectrum [285nm]
4. Detection: spectroscopy
5. Adv: non-invasive & avoidance of exogenously administered fluorophore
6. Disadv: limited penetration [few mm], software expertise, visible spectrum light to be turned off
7. Exogenous fluorophore: indocyanine green [i/v]
30-09-2021
112

113. SUMMARY
KEY THINGS TO REMEMBER IN THYROIDECTOMY
30-09-2021
113

114. 30-09-2021
114

115. BIBILIOGRAPHY
1. Surgery of the Thyroid and Parathyroid glands- 2nd edition: Gregory W. Randolph
2. Atlas of thyroid surgery: principles, practice and clinical cases: Ernest
Gemsenjaeger
3. Chassin’s operative stategy in General Surgery: An expositive atlas: 4th edition
4. SRB’s surgical operations: text and atlas
5. Kirk’s general surgical operations: sixth edition
6. Scott-Brown’s otorhinolaryngology head & neck surgery- volume I, 8TH edition
7. Sabiston textbook of surgery: 21st edition.
8. Schwart’z principles of surgery: 11th edition
30-09-2021
115

116. THYROIDECTOMY TRIVIA
MULTIPLE CHOICE QUESTIONS
30-09-2021
116

117. In what location,
relative to inferior
thyroid artery, is the RLN
found?
1. Medial or posterior to the ITA
2. Lateral or anterior to the ITA
3. Passing b/w the branches of ITA
4. All of the above
30-09-2021
117

118. Dunhill
procedure is
1. 2X lobectomy + partial isthmusectomy
2. 2X subtotal lobectomy +
isthmusectomy
3. Subtotal lobectomy + isthmusectomy +
total lobectomy
4. 2X total lobectomy + isthmusectomy
30-09-2021
118

119. An asymptomatic child with
normal physical
examination is found to
harbor a mutation in codon
918 of the RET tyrosine
kinase receptor,
compatible with MEN 2B.
USG of neck is
unremarkable & Sr.
Calcitonin levels are
normal. What course is
indicated ?
1. Repeat examination and
ultrasound yearly
2. Total thyroidectomy
3. Planned thyroidectomy in 3-5
years
4. Total thyroidectomy with bilateral
neck dissection
30-09-2021
119

120. 48/F with thyrotoxicos is
referred to the clinic,
she was poorly
controlled on
carbimazole and has
received orbital
radiotherapy for severe
proptosis. This has
improved matters but
she has relapsed on
stopping her
carbimazole.
1. Tru cut biopsy
2. Radioactive iodine
3. Thyroid lobectomy
4. Total thyroidectomy
30-09-2021
120

121. 55/M is in the HDU for
many months after
open aortic surgery.
He is maintained on
TPN. Clinically he is
euthyroid, but his TFT
reveal low TSH & low
T4. Diagnosis?
1. Sick euthyroid syndrome
2. Hypothyroidism
3. Hashimotos thyroiditis
4. Poor compliance with
thyroid metabolism
30-09-2021
121

122. Last dose of
carbimazole when
given in pre-op
preparation in a
thyrotoxicosis patient
for thyroid surgery is
given at?
1. 7 days prior to surgery
2. 5 days prior to surgery
3. 3 days prior to surgery
4. Evening before surgery
30-09-2021
122

123. Parathyroid
insufficiency after
thyroid surgery
develops usually
after
1. Within six hours
2. With 24 hours
3. 2-5 days
4. 1 week
30-09-2021
123

124. THANK-YOU
HOUSE IS NOW OPEN FOR Q & A
30-09-2021
124