Mature Plurihormonal PIT1 Lineage Pituitary Neuroendocrine Tumor

**Semantic type:** Neoplastic Process

**Definition:** A well-differentiated pituitary neuroendocrine tumor composed of PIT1-lineage adenohypophyseal cells with acidophilic cytoplasm, extensive immunoreactivity for growth hormone and variable immunoreactivity for TSH, prolactin, and alpha-subunit. (WHO)

**Synonyms:** - Mature Plurihormonal PIT1 Lineage PitNET/Adenoma - Mature Plurihormonal PIT1 Lineage Pituitary Neuroendocrine Tumor/Adenoma