CLCN2 and neurodegeneration with brain iron accumulation 2A: We investigated 30 different mutations in 30 Egyptian children molecularly diagnosed with WES that mainly comprised 6 novel mutations and highlighted 3 rare neurodevelopmental diseases (Kaya-Barakat-Masson syndrome, classical infantile neuroaxonal dystrophy [INAD], and CLCN2-related leukoencephalopathy).