X-linked intellectual disability-cubitus valgus-dysmorphism syndrome is characterised by moderate intellectual deficit, marked <i>cubitus valgus</i>, mild microcephaly, a short philtrum, deep-set eyes, downslanting palpebral fissures and multiple nevi. Less than ten individuals have been described so far. Transmission is thought to be X-linked recessive.

Underdevelopment of the malar prominence of the jugal bone (zygomatic bone in mammals), appreciated in profile, frontal view, and/or by palpation.