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A rare chromosomal anomaly syndrome resulting from the partial deletion of the long arm of chromosome 22 with a highly variable phenotype. The disease has characteristics of prematurity, pre and post-natal growth retardation, developmental delay (particularly speech), mild intellectual disability, variable cardiac defects and minor skeletal anomalies (such as clinodactyly). Dysmorphic features include prominent forehead, arched eyebrows, deep set eyes, narrow up slanting palpebral fissures, ear abnormalities, hypoplastic alae nasi, smooth philtrum, down-turned mouth, thin upper lip, retro/micrognathia and pointed chin.
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