Successful treatment of intravascular large B-cell lymphoma diagnosed by bone marrow biopsy and FDG-PET scan.

Early diagnosis of intravascular large B-cell lymphoma (IVLBCL) is difficult, but is critical for longer survival for the patients. We report a case of IVLBCL that was diagnosed with the help of FDG-PET. A 76-year-old woman was referred to us for the evaluation of her elevated serum LDH. She presented with general malaise and high fever. There were no skin lesions or neurological involvement. FDG-PET imaging showed increased uptake of FDG in the vertebra, bilateral femurs, sternum, and iliac bones. A diagnosis of IVLBCL was made by bone marrow biopsy. She was successfully treated with rituximab and modified CHOP therapy.