A prospective study has been carried on 37 patients affected by peritoneal carcinomatosis from various primary. Patients have been treated by cytoreductive surgery and intraoperative hyperthermic chemoperfusion. CC 0-1 has been achieved in 81%. The temperature distribution study showed a "barrier effect" with no statistically significant correlation to the survival. Major morbidity and mortality was respectively 37.8% and 16.2%. Two-yr overall survival was 49.1% for all series. Morbidity was significantly directly correlated to the duration of the surgical treatment. A learning curve of 19 months have been observed, after that only one death out 21 procedures has been recorded. Peritoneal carcinomatosis patients, that are submitted to integrated treatment, need a peculiar management that is not comparable to any other in the oncological setting and that requires specific competence.