Case report: calcification in benign cystic peritoneal mesothelioma.

Benign cystic mesothelioma of the peritoneum is a rare multicystic tumour that occurs predominantly in middle aged women with strong predilection for the surface of the pelvic viscera. Our patient was a 79-year-old woman who presented with weight loss and left upper abdominal mass showing calcification on CT. This is the first reported case of benign cystic mesothelioma with calcification. Differentiation from an adrenal tumour and peritoneal teratoma was not possible preoperatively.