Differentiating between primary and secondary Sertoli-cell-only syndrome by histologic and hormonal parameters.

The contribution of histologic differentiation between primary and secondary Sertoli-cell-only (SCO) syndrome in azoospermic men was evaluated. No correlation was found between the presence of sperm cells in the testis and the histologic findings or inhibin B or FSH levels, suggesting a low prognostic value for this differentiation.