Fig. 2
From: Large primary pleural synovial sarcoma with severe dyspnea: a case report
Pathological examination. The cut surface of the resected specimens shows a pleural tumor with parenchymatous hemorrhage (a). Microscopic examination (hematoxylin-eosin staining) shows a proliferation of atypical short spindle or oval cells with hyperchromatic nuclei and eosinophilic cytoplasm arranged in fascicles, whorls, or in a herringbone pattern with necrotic foci, associated with gaping thin-walled blood vessels displaying a hemangiopericytoma-like appearance (b)