Miliary tuberculous peritonitis mimicking advanced ovarian cancer.

Primary peritoneal tuberculosis is a rare presentation of this disease. It is usually associated with ascites and raised CA-125 levels. Occasionally a pelvic mass may be present making the preoperative differential diagnosis from advanced ovarian cancer extremely difficult. Acid-fast stains and special cultures of the ascitic fluid for Mycobacterium tuberculosis are frequently negative, and confirmation of the diagnosis commonly requires histologic examination of biopsy specimens, in which epithelioid granulomas with central caseous necrosis can be identified. We present a case of unexplained pyrexial ascites in a postmenopausal woman in whom the diagnosis of miliary peritoneal tuberculosis was confirmed laparoscopically. The role of noninvasive tools such as measurement of ascitic fluid adenosine deaminase levels is also discussed.