Multicystic benign mesothelioma of the peritoneum presenting as postmenopausal bleeding and a solitary pelvic cyst—a case report

Abstract

Background. All non-invasive diagnostic algorithms suffer from diagnostic uncertainty in discriminating benign from malignant adnexal masses. Case. We present a case where the identification of a large solitary multiloculated pelvic cyst in a woman with postmenopausal bleeding was shown to be multifocal multicystic benign mesothelioma (MBM) of the peritoneum at laparotomy. Conclusion. We wish to alert gynaecologists of this rare association and the unique appearance of mesothelioma lesions, which many would not instantly recognise. There is a lack of consensus on the treatment and follow-up of MBM. Most authorities consider curative treatment of MBM is achievable through complete disease cytoreduction (peritonectomy) as carried out in the case.