Presentation
Incidental finding in follow up of radical cystectomy.
Patient Data
Right perirenal hypoechoic tissue, poorly vascularized is visible in the middle to lower thirds.
CTaxial scan shows perirenal soft-tissue mass that enveloping the right kidney at the middle and lower thirds. There is subcapsular renal solid tissue hyperdense on direct examination, with significant enhancement after contrast and late wash out.
Histological report
Indolent behavior lymphoma derived from peripheral B lymphocytes.
Case Discussion
Primary renal involvement by lymphoma is rare because the kidneys do not contain lymphatic tissue, while the secondary renal involvement by lymphoma is quite common occurrence. Risk is increased in immunocompromised patients. Clinically is silent. Non-Hodgkin's lymphoma is much more common than Hodgkin's lymphoma in renal involvement.
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