ENDOMETRIOSIS is a frequent, not a rare, disease. In a recent test period, controlled to the extent that during it all the clinic's operations were done by one operator, there were among the female patients 78 cases of acute appendicitis and 107 cases of microscopically verified endometriosis.The natural course of this disease is from various stages of severe pain through dyspareunia and sterility, with all the marital disharmonies attendant on those complications, to pelvic invalidism. Endometriosis, however, is one of the few diseases with proportionately serious results for which there is a specific treatment—castration. Less radical therapy is effective . . .