14q22q23 microdeletion syndrome

14q22q23 microdeletion syndrome is a rare chromosomal disorder caused by a small deletion (microdeletion) on the long arm of chromosome 14, specifically in the region spanning bands q22 to q23. This condition is also referred to as 14q22-q23 deletion syndrome. Because this chromosomal region contains several important developmental genes, including BMP4 (bone morphogenetic protein 4) and OTX2 (orthodenticle homeobox 2), the deletion leads to a complex phenotype affecting multiple organ systems. The syndrome is characterized by eye abnormalities, which can range from anophthalmia (absence of one or both eyes) to microphthalmia (abnormally small eyes), as well as pituitary gland anomalies that may result in growth hormone deficiency and other endocrine problems. Affected individuals frequently present with craniofacial dysmorphism, including a broad forehead, flat nasal bridge, and ear anomalies. Skeletal abnormalities such as polydactyly (extra fingers or toes), brachydactyly, and other limb malformations are commonly observed. Intellectual disability of variable severity and developmental delay are also frequent features. Some patients may have brain structural anomalies. There is no cure for 14q22q23 microdeletion syndrome, and management is supportive and symptom-based. Treatment may include hormone replacement therapy for pituitary deficiencies, surgical interventions for eye or skeletal anomalies, and early developmental support services including speech therapy, physical therapy, and special education. Regular ophthalmologic, endocrinologic, and developmental assessments are recommended. Genetic counseling is advised for affected families to understand recurrence risks and guide family planning.

Common questions about 14q22q23 microdeletion syndrome