Multiple Synchronous Pituitary Neuroendocrine Tumors of Distinct Lineages

**Semantic type:** Neoplastic Process

**Definition:** Multiple pituitary neuroendocrine tumors composed of adenohypopheseal cells of two or more lineages or a null cell tumor in combination with a lineage-specific pituitary neuroendocrine tumor in the same gland.

**Synonyms:** - Multiple Synchronous PitNET/Adenomas of Distinct Lineages - Multiple Synchronous Pituitary Neuroendocrine Tumors/Adenomas of Distinct Lineages - Pituitary Gland Multiple Adenomas