Bilateral renal involvement in diffuse large B-cell lymphoma on fluorodeoxyglucose positron emission tomography/computed tomography

Abstract Secondary renal involvement in patients with diffuse large B-cell lymphoma (DLBCL) is rare and associated with poor prognosis. We, hereby, described a case of a patient diagnosed with DLBCL, in whom bilateral renal involvement was detected on 18 F-fluorodeoxyglucose positron emission tomography/computed tomography ( 18 F-FDG PET/CT). The patient received 4 courses of chemotherapy, and follow-up 18 F-FDG PET/CT revealed the complete resolution of the diffuse increased renal 18 F-FDG uptake. Renal lymphoma is uncommon and 18 F-FDG PET/CT is particularly useful for detecting extranodal involvement in DLBLC.