Fig. 5
Hematoxylin and eosin (H&E) stain of left palatal ulcer demonstrating a heterogeneous admixture of large atypical lymphocytes with occasional Hodgkin Reed-Sternberg (HRS) morphology, small lymphocytes, and histiocytes. HRS cells express CD30, PAX5, and EBER1 consistent with EBV-infected B-lymphocytes