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Treatment of stage II–IV nonseminomatous testicular germ cell tumors (NSTGCTs) consists of cisplatin-based combination chemotherapy and, when present, resection of residual retroperitoneal tumor mass (RRTM) by conventional laparotomy or laparoscopy. In case of a retroperitoneal recurrence, a second conventional or laparoscopic procedure may be challenging. A case of late relapse after prior conventional resection of a RRTM and tailor-made surgical management with a posterior retroperitoneoscopic resection (PRR) is reported. A posterior retroperitoneoscopic RRTM resection was performed in a 26-year-old male with a history of stage IIC NSTGCT, presenting with a late left-sided retroperitoneal relapse, 6 years after initial treatment. Postoperative course was uneventful and at 1-year follow-up the patient had no evidence of disease. Reoperative surgery by a minimal invasive retroperitoneoscopic approach should be considered as an alternative for patients with a recurrent retroperitoneal tumor mass of a NSTGCT.

Posterior retroperitoneoscopic resection of recurrent nonseminomatous tumor mass: a case report of the surgical procedure