Immunostaining showed that the tumor was neuroendocrine, as they were positive for Chromogranin A (CgA), Synaptophysin (Syn), CD56, CK, CK7, CK8, Epithelial membrane antigen (EMA), Recombinant Somatostatin Receptor 2(SSTR2), insulinoma-associated protein 1(INSM1), KI-67 was 70 %. The gene discussed is MUC1; the disease is neoplasm.