MONDO_0003257 (posterior pituitary gland neoplasm) is a low-grade neoplasm that arises from the neurohypophysis. It includes the granular cell tumor of the neurohypophysis and pituicytoma. Also known as: Neurohypophysis neoplasm, Neurohypophysis tumor, Neurohypophysis tumour, PITUICYTOMA, benign, neoplasm of neurohypophysis, neurohypophysis neoplasm, neurohypophysis neoplasm (disease), neurohypophysis tumor.