This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Medullary carcinoma thyroid all EXCEPT: March 2013 \nSelect and explain. \nA. Contains amyloid, B. TSH dependent, C. Secretes calcitonin, D. Patients should be screened for RET point mutation on chromosome 10', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. TSH dependent The rate of growth of papillary carcinoma thyroid may be stimulated by TSH Thyroid medullary Ca/ MTC 80% cases are sporadic, 20% are familial (MEN-Ha or MEN-Hb), MTC is the first abnormality expressed in MEN-Ha/ Ilb, Stroma of MTC shows material with staining propeies of amyloid, MTC can be diagnosed by demonstrating calcitonin within the MTC cells (on immuno-histochemical studies), Total thyroidectomy is the TOC', 'role': 'assistant'}]