Pituitary Neuroendocrine Tumor

**Semantic type:** Neoplastic Process

**Definition:** A well-differentiated neuroendocrine neoplasm that arises from the adenohypophysial cells of the anterior lobe of the pituitary gland. The tumor can be hormonally functioning or not. It has a low frequency of metastatic spread. When metastatic, the term metastatic pituitary neuroendocrine tumor is endorsed instead of pituitary carcinoma. (WHO)

**Synonyms:** - ADENOMA, ANTERIOR LOBE PITUITARY GLAND, BENIGN - Adenoma of Pituitary - Adenoma of Pituitary - Adenoma of Pituitary Gland - Adenoma of Pituitary Gland - Adenoma of the Pituitary - Adenoma of the Pituitary - Adenoma of the Pituitary Gland - Adenoma of the Pituitary Gland - PitNET - PitNET/Adenoma - Pituitary Adenoma - Pituitary Adenoma - Pituitary Gland Adenoma - Pituitary Gland Adenoma - Pituitary Neuroendocrine Tumor (Formerly Pituitary Adenoma) - Pituitary Neuroendocrine Tumor/Adenoma - Pituitary adenoma, NOS