• Kaei Nasu, Harunobu Matsumoto, Jun Yoshimatsu, and Isao Miyakawa.
• Department of Obstetrics and Gynecology, Oita Medical University, Oita, Japan. nasu@oita-med.ac.jp
• Gynecol. Obstet. Invest. 2002 Jan 1; 54 (4): 228-31.

AbstractWe report herein a rare case of ureteral and sigmoid obstruction caused by pelvic actinomycosis in a patient fitted with an intrauterine contraceptive device (IUCD). A 63-year-old Japanese woman was admitted complaining of lower abdominal pain and slight fever continuing for a month. She had a history of IUCD insertion 30 years previously and had been menopausal for the past 10 years. Ultrasonography and CT scan revealed a solid pelvic mass involving the uterus, sigmoid colon, urinary bladder, and right ureter. The IUCD was detected in the uterine cavity. Right hydronephrosis and hydroureter due to an obstruction of the distal ureter and the extensive stenosis of the sigmoid colon were also observed. Blood analysis showed leukocytosis, thrombocytosis, and elevated C-reactive protein levels. Although pathological and microbiological analysis of the removed IUCD showed negative results for Actinomyces infection, these findings suggested a pelvic abscess caused by actinomycosis. Benzyl penicillin administration was started immediately. Total hysterectomy, bilateral salpingo-oophorectomy, and lysis of adhesion around the ureter were performed. Actinomycosis was diagnosed based on histologic examination. The patient's postoperative course was uneventful except for persistent mild hydroureter and hydronephrosis. The patient is now healthy without evidence of recurrent Actinomyces infection 1 year after treatment. As shown in the present case, pelvic actinomycosis should be considered as a cause of pelvic inflammatory disease in IUCD users, even though Actinomyces was not detected on the IUCD.Copyright 2002 S. Karger AG, Basel

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