Fig. 1
From: Extranodal natural killer/T-cell lymphoma in Malawi: a report of three cases
Biopsy of sinonasal mass from Case 2. a Ulcerated squamous mucosa surrounded by necrosis and subepithelial proliferation of tumor cells (haematoxylin and eosin, 10×). b Moderate-to-large atypical lymphoid-appearing tumor cells with high mitotic activity (haematoxylin and eosin, 40×). c Tumor cells positive for CD56 by immunohistochemistry (40×). d Tumor cells positive for Epstein-Barr virus-encoded RNA by in situ hybridization (40×)