Are femoral hernial sacs of congenital or acquired origin? The answer to this question should be of interest to students of anatomy and embryology and to biologists in general, and of even greater interest and real practical importance to surgeons. If these sacs are always congenital, then simple extirpation of the peritoneal diverticulum would hold out promise of cure to patients afflicted with this condition. If, on the other hand, all are acquired, then removal of the sac alone will not be sufficient, and other factors concerned in the process must be corrected before a lasting repair can be obtained.
In order to study the factors that may have a bearing on this problem, two different types of observations were made. The first consisted of clinical material, that is, all femoral hernias seen at the University Hospital; the second, of anatomic dissections and measurements.
All femoral hernias, with the exception