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Mesotheliomas are mesenchymal neoplasms which originate in the lining membrane of various serous cavities and peritoneum. These are benign tumours slow growing. They are incidentally found during laparotomies for ovarian tumours with ascites. Common in women, exposed to asbestos. We present a rare para ovarian benign multicystic mesothelioma in a 41-years-old woman who presented like malignant ovarian tumour, with a huge cyst of size 25x15 cm containing four liters of haemorrhagic fluid and four small cysts of size 6x4 cm. Histological picture was confirmative for para ovarian benign mesothelioma.
Keywords: Mesothelioma, Benign Ovarian Tumour, Multiloculated Cyst.