INSM1 and neuroendocrine neoplasm: Reactivation of INSM1 has been observed in insulinoma, pheochromocytoma, pituitary tumor, medullary carcinoma of the thyroid, medulloblastoma, neuroblastoma, retinoblastoma, small-cell lung cancer, and neuroendocrine tumors of the head and neck/skin/prostate/female genital tract [3, 12–19].