The purpose of this study was to realize a computer system for cancer data automatic processing. A clinical research in oncological practice is usually time consuming and often not reliable or deceiving because of a number of various errors. Until now, only a few information systems have been specifically designed for cancer data processing, and these have a limited capacity of autonomous data elaboration. Our system, based on an original computer program, can compile, store and process essential data on cancer diseases, with a high degree of reliability and high speed of elaboration. Input and output of this system are simplified and user oriented, without limitations for the subject at study on clinical research, and no particular training of the physicians involved is necessary.