MEN1 and neoplasm: During the last decade, important national MEN1 databases favoured the study of epidemiological, diagnostic, clinical and therapeutic aspects of MEN1-associated tumours, such as the DutchMEN1 Study Group (DMSG), the Groupe d’Etude des Tumeurs Endocrines (GTE), the multicentre database of the MEN1 Consortium of Japan [6], and the Italian MEN1 database [7].