BCL2 and lymphoma: This is based on the composite histology which showed the histological and molecular features of FL (follicles with aberrant expression of BCL2 protein and presence of IgH-BCL2 translocation by PCR), and features of atypical Burkitt's lymphoma in the interfollicular regions (starry sky appearance, high mitotic rate, 95% MIB1 positivity, CD10 expression and FISH evidence of MYC translocations in the small noncleaved lymphoma cells).