All of the following are true about medullary carcinoma of thyroid except

A. It is tumour arising from C cells derived from the neural crest

B. Secrete high levels of calcitonin

C. It is not dependent on TSH

D. Most cases are familial

Correct Answer: Most cases are familial

Description: MEDULLARY CARCINOMA It is an uncommon type it arises from the parafollicular C cells which is derived from ultimobranchial body (neural crest) blood level of calcitonin is a tumour marker it is not dependant on TSH Most cases are sporadic and a small amount is familial ref ;(page no;486) 5th edition of SRB&;S Manual of SURGERY

Category: Surgery

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