Fig. 3
From: Mediastinal angiosarcoma mimicking constrictive pericarditis and aortic dissection: a case report
Intraoperative partially excised pericardium and immunohistochemical staining. There were multiple disseminated nodules on the pleural surface of the pericardium excised intraoperatively (A). Hematoxylin and eosin staining demonstrated atypical epithelioid cells proliferating in a sinusoidal pattern and vascular spaces lined by spindle cells (B). Immunostains were positive for CD 31, CD 34, D2-40, and ERG (C–F). Scale bar = 250 μm