label: Immature PIT1 Lineage Pituitary Neuroendocrine Tumor
label_lc: immature pit1 lineage pituitary neuroendocrine tumor
description: "An immature pituitary neuroendocrine tumor composed of PIT1-lineage adenohypophyseal cells with cytologic atypia and limited differentiation towards thyrotroph, somatotroph, and/or lactotroph cells. (WHO)"