Hypertelorism-microtia-facial clefting syndrome, or HMC syndrome, is a very rare syndrome characterized by the combination of hypertelorism, cleft lip and palate and microtia. The disease is hypertelorism, microtia, facial clefting syndrome (Monarch Disease Ontology entry MONDO_0009404). Also known as: Bixler Christian Gorlin syndrome, Bixler syndrome, Bixler-Christian-Gorlin syndrome, HMC syndrome, hypertelorism-microtia-clefting syndrome, hypertelorism-microtia-facial clefting syndrome.