AT National Association (ANAT) was established in order to support the research, prevention and therapy of Ataxia Telangiectasia (AT), also known as Louis-Bar Syndrome, a rare genetic disease that causes severe disability and early death. The association, initially entitled “Davide De Marini”, was founded by Alfredo De Marini in 1994 who is honorary president to this day. In 2016 the Assotiation undertook a close and concrete collaboration with the other associations present in the country with the objetive to join efforts in supporting the research on AT and creating a national network between associations, clinical centers and research centers. The reorganization and renewal, that started at the end of 2016 and finished at the end of 2017, led to the adoption of a new social name, modification of Social Statute and renewal of the board of directors for the inclusion of the Italian families with AT.