CRX and severe early-childhood-onset retinal dystrophy: Although all our patients were diagnosed clinically with STGD, the overlapping of phenotypes between different macular dystrophies and several stages of ABCA4-associated retinopathy could result in a misdiagnosis of STGD with mutations in phenocopying genes, such as PRPH2, ROM1, CRX, or RPGR (Cremers et al., 2020).