Intellectual Developmental Disorder, X-Linked, Syndromic, with Pigmentary Mosaicism and Coarse Facies, is also known as intellectual developmental disorder, x-linked syndromic, with pigmentary mosaicism and coarse facies. An important gene associated with Intellectual Developmental Disorder, X-Linked, Syndromic, with Pigmentary Mosaicism and Coarse Facies is TFE3 (Transcription Factor Binding To IGHM Enhancer 3). Affiliated tissues include bone and skin, and related phenotypes are intellectual disability and hypotonia