label: Sparsely Granulated Lactotroph Pituitary Neuroendocrine Tumor
label_lc: sparsely granulated lactotroph pituitary neuroendocrine tumor
description: "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."