1. Department of Dermatology and Pediatric Dermatology; National Reference Centre for Rare Disorders; Hôpital des enfants Pellegrin; Centre Hospitalier Universitaire du Bordeaux, place Amélie Raba Léon; Bordeaux 33000 France
2. Tumor Bank and Tumor Biology Laboratory; CHU de Bordeaux; Hôpital Haut-Lévêque, Avenue De Magellan, 33600 Pessac France
3. Biopathology Department; Centre Léon Bérard; 28 Rue Laennec, 69008 Lyon France
4. Department of Pathology; CHU de Bordeaux; Pessac France