| Abstract: | Peritoneal cystic mesothelioma is very rare clinical entity, and only a few cases situated on the greater omentum are described. The authors here presented two cases of the greater omentum cystic mesothelioma that were diagnosed in 260,000 adult patients hospitalized for the first time, during the fifteen year period. Cystic tumor of 30 cm in diameter was found in a 78 years old male patient, and the second one was 35 cm in diameter in female patient 56 years old. Symptomatology was not characteristic. Peritoneal pseudocyst or parasitic, lymphogen, urogenital, enteric or dermoid cyst origin was preoperatively excluded, and correct diagnosis was established upon the operative findings and immuno-histochemical investigations. In both cases keratin and vimentin were clearly positive in tumor cells, but other markers were negative (EMA, Actin, S-100, NSE, chromogranin and sinoptophysin). Cystic mesothelioma was not infiltrative and surgical treatment was simple and successful. |
