Ascites, high CA-125 and chronic pelvic pain in an unusual clinical manifestation of Enterobius vermicularis ovarian and sigmoid colon granuloma.

We present a case of a 36-year-old Caucasian woman with ascites, elevated CA-125, an enlarged left ovary and chronic pelvic pain who underwent an unnecessary surgical intervention because of suspected malignant disease. During the operation ovarian and sigmoid colon granulomatous tumors caused by Enterobius vermicularis infestation were revealed. In this case, the presence of Enterobius vermicularis ova in the abdominal cavity appears to have caused a sufficient reaction to produce symptoms and signs of malignancy leading to surgical intervention. Moreover, awareness that such lesions may occur is important since the lesions and clinical signs may be misinterpreted as being malignant with subsequent unnecessary surgical intervention.