Fig. 2
From: Chalazion-mimicked eyelid angiosarcoma in a young Asian with good prognosis: a case report
Pathologic findings of angiosarcoma. A, atypical endothelial cells showing sheet-like growth and scanty slit-like vascular structures filled with some RBCs and invading skeletal muscle bundles (hematoxylin and eosin, 100x). B, atypical endothelial cells lined by vascular structures filled with RBC (arrow)(hematoxylin and eosin, 400x). C, positive expression for CD31 (immunohistochemistry, 200x). D, high Ki-67 index of 95% (immunohistochemistry, 400x)