Fig. 1From: Histologic, immunohistochemical, and molecular features of pituicytomas and atypical pituicytomasHistologic features of pituicytomas. Morphology varied across tumors, and included both fascicular and sheet-like growth patterns (a and b, respectively). Nuclei ranged from spindled to epithelioid (c and d, respectively). Vague nuclear palisade structures were present (e, highlighted by arrows). While pleomorphism was mild, some tumors showed focal areas of ancient-type change (f, highlighted by arrows). All images stained with hematoxylin and eosin. a, b and e at 100x; c and d at 200x; f at 400xBack to article page