secretory granules are characteristic in the following tumors : mucin granules in poorly differentiated adenocarcinomas , zymogen granules in acinic cell carcinomas , lysosomal granules in prostatic carcinomas , melanin granules in malignant melanoma , carcinoid , islet cell tumors , pheochromocytoma , and neuroblastoma granules in the corresponding neoplasms .
C0001418
adenocarcinomas
C0007095
carcinoid