Onco-Testicular Sperm Extraction (oncoTESE): A Contemporary Concept Review and Report of Australian Sperm Retrieval Rates and Fertility Outcomes.

Objective: To assess sperm retrieval rates of Onco-Testicular Sperm Extraction (oncoTESE) in men with testicular tumors and coexisting severe spermatogenic impairment.

Methods: Multi-centre Australian wide retrospective review of oncoTESE procedures performed within the last 10 years. Patients were postpubertal adults having a testicular tumor requiring orchidectomy, with severe oligozoospermia or nonobstructive azoospermia. Ipsilateral testicular sperm extraction was performed following radical inguinal orchidectomy. A contralateral micro-testicular sperm extraction was performed if no sperm or insufficient amounts were initially achieved. Surgical sperm retrieval rates, live birth rates and post operative serum testosterone were recorded.

Results: Four surgeons compiled a total 13 patients. The mean age was 34.9 years. Seven of 13 were germ cell tumor (GCT), 4 of 13 had non-GCT and 2 of 13 contained benign lesions. Twelve of 13 patients were azoospermic and 1 was severely oligozoospermic. Sperm was found in 6 of 7 GCT patients; 3 of 7 were found in the ipsilateral testis whilst the remaining 4 underwent contralateral micro-testicular sperm extraction; sperm was retrieved in 3 of 4. The respective mean pre and post orchidectomy testosterone was 12.0 vs 14.1nmol/L (GCT cohort). Cryopreserved sperm has been used in assisted reproduction in 2 of 13 patients, with median follow up of 38.7 months. Including use of both cryopreserved and fresh sperm, 6 pregnancies were achieved, including 5 healthy live births and 1 miscarriage.

Conclusion: OncoTESE appears feasible, with acceptable sperm retrieval and subsequent live birth rates, following assisted reproduction. Despite significant underutilisation in the Australian population, oncoTESE should be considered in the management for TC patients with severe oligozoospermia, or nonobstructive azoospermia.