RPGR and Alzheimer disease: RHO (3, 25.0%) was the most commonly identified mutated gene in 12 RP patients with AD inheritance (adRP; 20.7%), USHA2A (13, 31.0%) and EYS (6, 14.3%) were the most commonly identified mutated genes in 42 RP patients with AR inheritance (arRP; 72.4%), and RPGR (2, 50%) was the most commonly identified mutated gene in four RP patients with XL inheritance (xlRP, 6.9%).