I was working at MID-CBR Project (A Unified Framework for the Development of Case-Based Reasoning Systems) that was Funded by Ministerio de Ciencia y Tecnología, Fondo Europeo de Desarrollo Regional (FEDER) (2006-2009). Particularly, I was working in the project of Universitat Ramon Llull (MID-CBR-GRSI Ref. TIN2006-15140-C03-03) and with one of the EPO of this project, Hospital Clinic i Provincial de Barcelona, and specifically its dermatology department. The medical researchers of this department were experts in melanoma domain and provided us data about melanoma over which we can apply AI techniques. In this way i would like to improve diagnostic results on melanoma cancer using artificial intelligence techniques combined by ensemble learning.