Prostatic acid phosphatase, aspermia, and alcoholism in rape cases.

In a few alleged rape cases, examination of vaginal secretions will be negative for spermatozoa but positive for significant levels of prostatic acid phosphatase. These laboratory results can occur in cases in which the accused is known to have sired children. The most common etiologic factors for the aspermia are vasectomies and chronic alcoholism with or without cirrhosis.