Case Report
Copyright ©The Author(s) 2021.
World J Clin Cases. Mar 6, 2021; 9(7): 1654-1660
Published online Mar 6, 2021. doi: 10.12998/wjcc.v9.i7.1654
Figure 2
Figure 2 Histopathologic features of the patient’s tumor. A: Tissue from the sinonasal cavity is mostly composed of necrotic abscess, except for the hypercellular tumorous area (arrows) surrounding the respiratory epithelium; B: On higher magnification, the large tumor cells show immunoblastic morphology with amphophilic cytoplasm and single prominent nucleoli (inset); C: Positive CD20 immunostaining highlights neoplastic large B cells, suggestive of diffuse large B-cell lymphoma; D: The tumor cells are diffusely positive for Epstein-Barr virus in situ hybridization.