RPGR and retinitis pigmentosa 1: In a recent article, Mihailovic N et al. reported for the first time a Caucasian male patient who exhibited RP due to a complete segmental deletion of the X-linked RPGR gene, accompanied by a deletion of approximately 378 kb of gene segment Xp11.4 (37814711_38192813) of the Xp11.4 chromosome (Mihailovic et al., 2022).