1. All of the following are true about medullary thyroid cancer except:
a. bilateral tumours appear in 90% of sporadic cases.
b. MTC is typically unilateral in 80 % of cases.
c. C cell hyperplasia is a premalignant lesion.
d.Tumours stain positive for calcitonin gene-related peptide.
2. All of the following are false about medullary thyroid cancer except:
a. FNAB cytology is contraindicated.
b. 50% of patients with MTC have familial disease.
c. All new patients with MTC should be screened for RET point mutations.
d. Calcitonin is a better predictor of prognosis, as compared to CEA.
3. All of the following are true about medullary thyroid cancer except:
a. MTC is operated before pheochromocytoma.
b. pheochromocytoma is operated before MTC.
c. I 131 is ineffective.
d. Total thyroidectomy is recommended for MTC.
4. All of the following are true about medullary thyroid cancer except:
a. Bilateral central node dissection should be routinely performed.
b. Triple phase liver CT is indicated if palpable lymph nodes are present.
c. Liver metastasis is amenable to resection.
d. Prophylactic thyroidectomy is indicated in RET mutation carrier.
5. All of the following are true about medullary thyroid cancer except:
a. MEN 2A patients with MTC has a better prognosis than sporadic cases.
b. Sporadic cases of MTC has a better prognosis than MEN 2A patients.
c. Prognosis is the worst in patients of MEN 2B.
d. Those with MEN 2B mutation should undergo prophylactic thyroidectomy before 1 year of age.
