In simple words: Microcheilia is a birth defect where the lips are unusually small.

Microcheilia is a congenital malformation characterized by abnormally small lips.

Example 1: A newborn infant is examined and found to have abnormally small lips, consistent with microcheilia., A child presents with difficulty in breastfeeding due to microcheilia affecting their ability to latch., A teenager undergoes reconstructive surgery to correct microcheilia that has impacted their speech and facial appearance.

** Excludes1: cleft lip and cleft palate (Q35-Q37) conditions classified to Q67.0-Q67.4 congenital malformations of skull and face bones (Q75.-) cyclopia (Q87.0) dentofacial anomalies [including malocclusion] (M26.-) malformation syndromes affecting facial appearance (Q87.0) persistent thyroglossal duct (Q89.2)