Cystic mesothelioma mimicking as ascites

Cystic mesothelioma is a rare neoplasm of the peritoneum, the mesothelial origin of which has been suggested by recent ultra-structural studies. Till 1999, 130 cases have been reported in the literature. Unlike its malignant counterpart, cystic mesothelioma is not related to prior asbestos exposure. Even though it does not metastasise or turn malignant it may recur locally. Cystic mesothelioma of the peritoneum has non-specific, multilocular cystic appearance on images obtained with several modalities (USG, CT). Adequate therapy of cystic mesothelioma of the peritoneum requires complete resection at the first opportunity. Because of this rarity the case has been reported here.