Sparsely Granulated Lactotroph Pituitary Neuroendocrine Tumor

**Semantic type:** Neoplastic Process

**Definition:** A prolactin-producing pituitary neuroendocrine tumor composed of relatively large, chromophobic or slightly acidophilic cells with well developed, abundant endoplasmic reticulum, and many immature secretory granules. Mature secretory granules are sparse.

**Synonyms:** - Sparsely Granulated Lactotroph PitNET/Adenoma - Sparsely Granulated Lactotroph Pituitary Neuroendocrine Tumor/Adenoma - Sparsely Granulated Pituitary Gland Lactotroph Adenoma