12q15q21.1 microdeletion syndrome

A rare chromosomal anomaly syndrome resulting from a partial deletion of the long arm of chromosome 12 with a highly variable phenotype. The disorder has typical characteristics of developmental delay, learning disability, intrauterine and postnatal growth retardation, and mild facial dysmorphism that changes with age. Nasal speech and hypothyroidism are also associated.

SNOMEDCT_US