Sperm retrieval by conventional testicular sperm extraction for assisted reproduction in patients with Zinner syndrome.

We present data from three Caucasian men with Zinner syndrome who attended our center for the treatment of primary couple's infertility. Each patient was scheduled for multiple conventional testicular sperm extraction (cTESE) and cryopreservation. The mean duration of infertility was 243 months. Sperm analysis confirmed absolute azoospermia. In patient 1, imaging revealed right and left testis volumes of 24 mL and 23 mL, respectively; dilatation of the right caput epididymis, corpus, and cauda; left seminal vesicle agenesis; severe right seminal vesicle hypotrophy; right renal agenesis; and left nephroptosis. The patient's levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH), and total testosterone (TT) were 3.2 IU/L, 5.2 IU/L, and 22.3 nmol/L, respectively. Patient 2 exhibited right and left testis volumes of 18 mL and 16 mL, respectively; a left seminal vesicle cyst of 3228 mm; ipsilateral kidney absence; and right seminal vesicle agenesis. The patient's levels of FSH, LH, and TT were 2.8 IU/L, 4.2 IU/L, and 14.3 nmol/L, respectively. In patient 3, ultrasound showed a testicular volume of 10 mL bilaterally, a 6546 mm left seminal vesicle cyst, right seminal vesicle enlargement, and left kidney agenesis. The patient's levels of FSH, LH, and TT were 32.0 IU/L, 16.3 IU/L, and 9.0 nmol/L, respectively. Sperm retrieval via cTESE was successful in all patients. It may be advisable to perform cTESE to obtain fresh sperm on the day of oocyte retrieval. Sperm cryopreservation should be avoided, since thawing could further compromise the sperm quality.