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Predictive factors of successful testicular sperm recovery in non-obstructive azoospermia patients.
International Journal of Andrology 2001 October
Recovery of testicular spermatozoa from non-obstructive azoospermic patients for intracytoplasmic sperm injection (ICSI) is a recent advance in the treatment of male infertility. The purpose of this study is to identify predictive factors for sperm recovery in non-obstructive azoospermic patients. A total of 178 men with non-obstructive azoospermia had multiple testicular sperm extraction (TESE) procedures to recover spermatozoa for intracytoplasmic sperm injection (ICSI) from June 1996 to February 1999. Testicular volume, serum follicle stimulating hormone (FSH) level and testicular histology were examined as positive predictive factors for sperm recovery. Testis biopsies were categorized as severe hypospermatogenesis, maturation arrest and Sertoli cell-only syndrome based on the most advanced pattern of spermatogenesis seen on histology. Sperm retrieval success rates for the patients in three histopathological categories were compared. Spermatozoa were successfully recovered in 94 of 178 (52.8%) men. Sperm were retrieved in 13 of 80 (16.3%) with Sertoli cell-only syndrome, 15 of 24 (62.5%) with maturation arrest, and 66 out of 74 (89.2%) with severe hypospermatogenesis. Spermatozoa recovery has no correlation with testicular volume or serum FSH level. When compared against Sertoli cell-only syndrome, the odds of sperm retrieval success rate was 44.3 times higher in severe hypospermatogenesis and 8.4 times in maturation arrest. These results demonstrate meaningful correlation between successful testicular sperm recovery and testis histopathology. Only testicular histopathology can be used as a predictor of successful sperm recovery.
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