specific chromogranin staining was noted in all polypeptide hormone producing human tumors studied ( pheochromocytoma chromaffin cells , n = 3 ; medullary thyroid carcinoma parafollicular c cells , n = 2 ; thyroidal c cell hyperplasia cells , n = 1 ; parathyroid adenoma chief cells , n = 1 ; pancreatic islet cell tumor islet cells , n = 1 ; oat cell carcinoma cell line m-103 ) as well as in all normal polypeptide hormone producing tissues ( adrenal medulla chromaffin cells , parathyroid chief cells , thyroid parafollicular c cells , pancreatic islet cells , gut enteroendocrine cells , and anterior pituitary cells ) .
C0238462
medullary thyroid carcinoma
C0229579
thyroid parafollicular