The mildest form of otopalatodigital syndrome spectrum disorder that is characterized by a generalized skeletal dysplasia, mild intellectual disability, conductive hearing loss, and typical facial anomalies. The disease is otopalatodigital syndrome type 1 (Monarch Disease Ontology identifier MONDO_0010704). Also known as: OPD 1 syndrome, OPD I syndrome, OPD syndrome 1, OPD1, Taybi syndrome, oto-palato-digital syndrome type 1, otopalatodigital syndrome, type 1, otopalatodigital syndrome, type I.