The computer data processing will therefore ensure the role of a data warehouse to generate clinico-epidemiological reports and analysis and that of a virtual catalog of biological material. MELBASE project will be consistent with the ethical chart of the hospital tumor banks published by Inca and will be managed by a chart ensuring each participating center management autonomy and availability of the data put into the database and made available. A multidisciplinary scientific advisory board will identify research priorities based on clinical practice and scientific knowledge.