congenital unilateral hypoplasia of depressor anguli oris
MONDO:0007443
A congenital anomaly, characterized by the unilateral hypoplasia/agenesis of the depressor anguli oris muscle, resulting in an asymmetric crying facies in neonatal period/ infancy (drooping of one corner of the mouth during crying) while eye closure, nasolabial fold and forehead wrinkling are symmetric. While it can be isolated, this anomaly is also seen in 22q11.2 deletion syndrome and can be accompanied by other major congenital anomalies of the cardiovascular system, as well as less frequently the musculoskeletal, cervicofacial, respiratory, genitourinary, and, rarely, endocrine systems. When isolated, the condition is cosmetically insignificant as the infant gets older (as the muscle does not contribute significantly to facial expression in childhood/adulthood).
Outbreak surveillance
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View congenital unilateral hypoplasia of depressor anguli oris on the outbreak map →Asymmetric crying facies
Asymmetric crying facies (ACF), also called Cayler cardiofacial syndrome, partial unilateral facial paresis and hypoplasia of depressor angula oris muscle, is a minor congenital anomaly caused by agenesis or hypoplasia of the depressor anguli oris muscle, one of the muscles that control the movements of the lower lip. This unilateral facial weakness is first noticed when the infant cries or smiles, affecting only one corner of the mouth and occurs on the left side in nearly 80% of cases. When the hypoplasia of the depressor anguli oris muscle is associated with congenital cardiac defects, the term 'Cayler cardiofacial syndrome' is used. Cayler syndrome is part of 22q11.2 deletion syndrome. It was characterized by Cayler in 1969.
Background only. Canonical identity remains MONDO; clinical-trial relationships come from ClinicalTrials.gov.Drugs being studied
Disease identity and terminology: MONDO. Trial relationships: ClinicalTrials.gov.