Case I. Miss C. M. began menstruating when 13 years old and developed severe dysmenorrhea soon after. She presented, aged 18 years, with an offensive vaginal discharge, resistant to simple therapy, which began suddenly, 17 months previously. Examination under anesthesia revealed a purulent discharge, and the uterus displaced by a left tuboovarian swelling. Endometrial curettings were normal histologically and sterile on culture. A vaginal swab cultured coliform organisms. Her symptoms persisted, and 4 months later the examination was repeated. This showed that compression of the tuboovarian swelling caused the vagina to fill with pus, via the cervix. At laparotomy, a bicornuate uterus was found; the right appendages were normal, but the left ovary contained several chocolate cysts and was adherent to nearby structures. The swelling, previously patpated, was the distended cervix of the left hemiuterus, with the normal right cervix adjacent. The distended cervix was incised and the pus drained. but no communication with its fellow nor with the vagina was found. The left hemiuterus, Fallopian tube, and ovary were therefore excised. Histologically, this uterus was of normal structure, but the ovary showed evidence of endometriosis. A postoperative intravenous pyelogram showed the absence of the left kidney. The patient has subsequently felt well, menstruation is normal, and she has no vaginal discharge. Case 2. Miss B. L. presented aged 16 years. S!-.e had menstruated normally for 3 years, but cornplained of severe dysmenorrhea for 2 years, plus an offensive, persistent vaginal discharge. Examination under anesthesia revealed a bicornuate uterus with an enlarged left horn. Pus issued from a sinus in the left lateral fornix, but probing this failed to show any communication with the uterus. A sound, passed through the cervix, rntrred the right horn only. No curettings were obtainrd. The pus cultured anaerobic streptococci only. The left kidney was absent on an intravenous pyelogram. At laparotomy. the uterine abnormality was confirmed, the left horn being larger than the right. The right Fallopian tube and both ovaries were normal. The left Fallopian tube was thickened and dilated, and its fimbrial end closed hy adhesions. It was excised, and histologically showed nonspecific inflammatory changes. Culture showed no evidence of tuberculosis. Improvement occurred temporarily, but the patient returned, aged 21 years, with recurrence of her symptoms. A hysterosalpingogram showed filling of the right horn and Fallopian tube ranly. At repeat laparotomy, dense adhesions were found around the previous salpingectomy site. Further exploration revealed a large cystic swelling, whicll was the left hemicervix distended with altered, offensive-smelling blood. Communication with neither the right horn nor the vagina could be demonstrated. The left hemiuterus and left nvary wrrr~ excised. The patient’s subsequent progress has been satisfactory, menstruation remains normal. dnd Lherc is no vaginal discharge.