has material basis in autosomal recessive disease craniofacial dysmorphism, skeletal anomalies, and mental retardation syndrome craniofacial dysmorphism, skeletal anomalies, and impaired intellectual development syndrome 1 A craniofacial dysmorphism, skeletal anomalies, and mental retardation syndrome that is characterized by cranial involvement with macrocrania at birth, brachycephaly, anomalies of middle fossa structures including hypoplasia of corpus callosum, enlargement of septum pellucidum, and dilated lateral ventricles, as well as cortical atrophy and hypodensity of the gray matter and that has_material_basis_in homozygous mutation in the TMCO1 gene on chromosome 1q24. disease_ontology MIM:213980 DOID:0081124 autosomal recessive inheritance