<prompt> Which among the following is the most common thyroid cancer?PapillaryMedullaryFollicularAnaplatic  <response>: Ans: a Papillary Ca Ref: Robbins, 7th ed, p. 1178Papillary Ca is the most common malignancy accounting for 80-90 of all cases followed by follicular Ca. thyroid. 10.Remember the following facts about thyroid malignancies, they are extremely helpful... Most common malignancy of endocrine system- Thyroid Ca Most common malignancy thyroid-Papillary Ca Most malignant- Anaplastic Ca Least malignant- Papillary Ca MC thyroid Ca after irradiationLatent period 30 yrs- Papillary Ca MC thyroid Ca in long standing MNG- Follicular Ca Psammoma bodies seen in...- Papillary Ca Orphan Annie nucleus seen in...- Papillary Ca Thyroid Ca aw dystrophic calcification-Papillary Ca Thyroid Ca aw amyloidosis- Medullary Ca Thyroid Ca derived from c cells- Medullary Ca Thyroid Ca aw MEN syndrome- Medullary Ca Tumour marker for medullary Ca- Calcitonin Tumour marker for papillary Ca-Thyroglobulin 