6q25.2q25.3 microdeletion syndrome

6q25.2q25.3 microdeletion syndrome (Orphanet: 251056) is a rare chromosomal disorder caused by a submicroscopic deletion on the long arm of chromosome 6, specifically in the 6q25.2 to 6q25.3 region. This deletion typically arises de novo, meaning it occurs as a new genetic event rather than being inherited from a parent. The syndrome is characterized by a recognizable pattern of clinical features that can vary in severity depending on the size of the deletion and the specific genes involved. Key clinical features include intellectual disability, developmental delay (particularly speech and language delay), and distinctive facial features such as a broad nasal bridge, thin upper lip, and micrognathia. Many affected individuals also present with growth retardation, feeding difficulties in infancy, and behavioral abnormalities. The musculoskeletal system may be affected, with some patients showing joint hypermobility or skeletal anomalies. Congenital heart defects and genitourinary anomalies have also been reported in some cases. The ESR1 (estrogen receptor 1) gene, located within this deleted region, is considered a candidate gene contributing to some of the phenotypic features, particularly those related to bone metabolism and growth. There is currently no cure for 6q25.2q25.3 microdeletion syndrome. Management is supportive and symptom-based, involving early intervention programs, speech therapy, physical therapy, and special educational support. Cardiac or other structural anomalies may require surgical intervention. Regular developmental assessments and multidisciplinary follow-up are recommended to optimize outcomes for affected individuals.

Common questions about 6q25.2q25.3 microdeletion syndrome