Sections show diffuse infiltrate of intermediate-sized rounded cells with non-cleaved nuclei with very occasional histiocytes imparting starry sky pattern.
Tumor cells are diffusely positive for CD20 and CD10. CD3 stains few scattered small cells. CK, TdT is negative. Ki67 labeling index was about 95%. This is diagnostic of Burkitt's Lymphoma.
Referred blocks for immunostaining of multiple jenunal perforations.
Fifteen referred paraffin blocks and Hx&E stained slides coded 2785-26.
Jenunal perforations, biopsy, immunostaining: