Figure 1. Bone marrow aspiration (Leishman stain, 100X) shows marrow particles (arrowhead), megakaryocytes (short arrow) and cluster of malignant epithelial cells (long arrow). Fig. 2. Bone marrow trephine biopsy (Haematoxyline-Eosine stain; 400x) shows diffuse infiltration by lymphoma cells (arrow), along with clusters of non-haematopoietic cells with abundant clear cytoplasm (arrowhead). Fig. 3. 18F-FDG (fludeoxyglucose) positron emission tomography (PET) at diagnosis shows cervical, axillary, inguinal and abdominal lymphadenopathy. Fig. 4. 18F-FDG PET/CT after six cycles of R-CHOP shows complete remission.