Fig. 2

Histologic features of lymphomas observed via H&E staining. a Diffuse distribution of tumor cells (medium- or large-size) with lightly stained cytoplasm and heavily stained or bubbly nuclei was observed in the mediastinal mass (×200). b Large amounts of small lymphocytes formed a perivascular "angiolymphoid set" in the mediastinal tumor tissue (×200). c Mitosis was observed frequently in the mediastinal tumor cells (×400). d The right supraclavicular lymph node tissue was separated into nodules of varying size by refractive collagen fibers (×40). e Large tumor cells of varying size and distribution were scattered throughout the lymph node tissue (×200). f Lacunar cells were observed in lymph node sections (×400)