Computed tomography in renal lymphoma.

The computed tomographic characteristics of 15 cases of renal lymphoma were evaluated. Initially the renal lesions are nodular but become confluent as the tumor progresses. In histiocytic and Hodgkin lymphoma, lesions can have the same attenuation values as normal renal parenchyma on noncontrast scans but less than normal parenchyma after contrast medium administration. Computed tomography is also useful in evaluating prognosis and response to therapy in renal lymphoma. Contrast material should be given if possible for evaluation of these lesions.