Neoplasm in kidney graft. Analysis of the cause of the tumour and treatment options.

Kidney transplant is the treatment of choice for chronic kidney disease. Cardiovascular disease, infections, and postransplant de novo neoplasms are the main causes of death in transplant patients. The most frequent kind of post kidney transplant neoplasms are lymphoproliferative processes and cutaneous neoplasms.

Primary diffuse large B-cell lymphoma of the corpora cavernosa presented as a perineal mass.

Primary male genital lymphomas may appear rarely in testis, and exceptionally in the penis and prostate, but there is not previous evidence of a lymphoma arising from the corpora cavernosa. We report the first case in the literature of a primary diffuse cell B lymphoma of the corpora cavernosa presented with low urinary tract symptoms, perineal pain and palpable mass. Diagnosis was based on trucut biopsy, histopathological studies and computed tomographic images.