The morphology of seminiferous tubules of human testicular biopsies. Analysis of the data obtained with two different techniques.

Testicular biopsies of fertile men and of azoospermic patients for vas deferens agenesis were processed with two different techniques, i.e. routine histological procedure and semithin sections of electron microscopy preparations. Tubular morphology, testicular biopsy score count and tubular diameter were analyzed in comparison. The two techniques give rise to a different qualitative and quantitative evaluation of all tubular parameters considered. Otherwise they confirm the real existence of the so-called 'tubular blockage' situation with central tubular cellular mass and cell degeneration.