<prompt> Most common thyroid cancer:PapillaryMedullaryFollicularAnaplastic  <response>: Ans: a Papillary Ref: Bailey Love, 24th ed, p. 97Relative incidence: Papillary carcinoma - 60 Follicular carcinoma - 20 Anaplastic carcinoma - 10 Medullary carcinoma - 5 Malignant lymphoma - 5Important points about thyroid malignancy: Least malignant- Papillary CaMC type of thyroid cancer after radiation- Papillary CaThyroid Ca associated with dystrophic calcification- Papillary CaPsammoma bodies are seen in- Papillary CaOrphan Annie eye nuclei are seen in- Papillary CaMost malignant- Anaplastic CaType of thyroid Ca associated with MEN syndrome- Medullary CaThyroid Ca associated with amyloidosis- Medullary CaCarcinoma derived from the C cells of thyroid- Medullary CaThyroid Ca occurring in long lasting multinodular goiter- Follicular Ca 