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Human Reproduction, Vol 13, 3402-3405, Copyright © 1998 by Oxford University Press

ARTICLES

Partial obstruction of the seminal path, a frequent cause of oligozoospermia in men

IG Belmonte and MN Martin de Serrano
Department of Urology and Andrology, Santa Cristina University Hospital, Madrid, Spain.

The objective of this clinical study was to determine the real frequency and clinical importance of partial obstruction of the seminal path in patients with oligozoospermia. We have designed a prospective clinical study including men with oligozoospermia seen at an andrological consultation in both private and institutional hospitals. A testicular biopsy was done on all patients under local anaesthesia. A complete study for sterility was also done [hormonal determinations: follicle-stimulating hormone (FSH), luteinizing hormone (LH), testosterone, testicular ultrasound, semen analysis, testicular Doppler ultrasound, etc.]. We have made a quantitative and qualitative evaluation of testicular biopsy (percentage of tubules with Sertoli cell only or with hyalinization; mean tubular diameter; number of spermatogonia, primary spermatocytes, young spermatids, mature spermatids and Sertoli cells; and evaluation of testicular interstitium: number of Leydig cell clusters, presence of angiectasis, presence of perivascular inflammation). Sixty one per cent of all oligozoospermia cases were obstructive. The principal cause of obstructive oligozoospermia was the presence of testicular varicocele. In obstructive oligozoospermia, the tubular diameter and number of mature spermatids are statistically significantly higher than in non- obstructive oligozoospermia. Obstructive oligozoospermia is a frequent condition caused by partial obstruction of seminal path. A quantitative analysis of the testicular biopsy is the only method of diagnosis.
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M. Nistal, P. Gonzalez-Peramato, and R. Paniagua
Diagnostic Value of Differential Quantification of Spermatids in Obstructive Azoospermia
J Androl, September 1, 2003; 24(5): 721 - 726.
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