Fig. 2From: Primitive neuroectodermal tumor of the pericardium: a case report and literature reviewThe histopathological characteristics of the tumor in the pericardium. a, b Hematoxylin and eosin staining. The higher power view shows uniform small round blue cells with scant cytoplasm. c–f Immunohistochemical staining (400 × magnification) of CD99, Ki67, NSE and Vimentin, respectivelyBack to article page