61-year-old patient with a history of radical prostatectomy with staging obturator lymphadenectomy for moderately differentiated prostate carcinoma (Gleason score 5), with limited microscopic involvement of the resection margins. Three months after prostate surgery, he consulted for an increase in right testicular volume, with negative testicular tumour markers, a mass with irregular areas on ultrasound and decreased vascular flow on Doppler study. The preoperative evaluation had included an abdominal CT scan with no findings. Post-orchiectomy CT scan detected retroperitoneal adenopathies from the inguinal area to the renal bifurcation.
After performing an inguinal orchiectomy, he was diagnosed with diffuse large B-cell testicular lymphoma.

He was given an initial course of cytoreductive chemotherapy according to the R-CHOPx8 schedule, with complete remission after induction. He presented an early relapse treated in second line with IFOVM / DHAP, with initial remission after three cycles and then a new relapse, dying 14 months after diagnosis.

