Ovary, Brenner tumor.

Solid and partially cystic epithelial nests are surrounded by a stroma composed of bundles of tightly-packed spindle shaped cells. The epithelial cells are polygonal and of the squamoid type, with pale, eosinophilic cytoplasm and oval nuclei having distinct nuclei and longitudinal grooving, a "coffee-ben appearance.

C. Matthew Peterson, M.D.

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