Double Pituitary Neuroendocrine Tumors of Distinct Lineages

**Semantic type:** Neoplastic Process

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

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