Background:The Information Health Systems are necessary for the coverage of managerial medical data needs, supporting the medical personnel for patients’ diagnosis, through an advanced Electronic Health Record. Aim: The present study aimed to present the need for an Electronic Health Record, in diagnosis thyroid cancer and also in the management of medical information. Method and material: Access in the website Wikipedia and a study of PhD papers, articles and medical books. Results: In order for an Information Health System to be affective, it is materialized in such a way that it acts like a human. In that case, experienced systems play an important role and more specifically, the Artificial Neurotic Networks as well as Artificial Intelligence. In addition, the same relation types must be applied to the models receiving information, with which the programs are supplied. Finally, it is the doctor who will determine the diagnosis based on his training results. A complete image of data observation of the course of a patient from a series of devices is possible if it is entered in a data base which can store information and data from the hospital information system and everything is compatible. Conclusions: In the next few years, there is expected to be intense activity in subjects as the materialization of Electronic Medical Records, hospital computerized records and applications in the Health network with the aim of achieving more valid patient diagnosis and the amelioration of medical healthcare.