Carcinoma in situ in testicular biopsies from men presenting with infertility.

This study concerns 2043 male partners of infertile marriages who underwent testicular biopsy in the 28 years from 1955 to 1982. In a review of the pathological material carcinoma in situ (CIS) was diagnosed in 8 men (0.39%). Six of these men were later found to have invasive germ cell tumours; one has remained tumour-free and one is lost to follow-up. The implication of these findings in relation to the selection of patients for biopsy and the treatment of CIS when diagnosed is discussed.