7q31 microdeletion syndrome

7q31 microdeletion syndrome (Orphanet code 251061) is a rare chromosomal disorder caused by a submicroscopic deletion on the long arm of chromosome 7 at band q31. This region encompasses several genes, including FOXP2, a gene critically involved in speech and language development. The syndrome primarily affects the nervous system and is characterized by significant speech and language impairment, which is often the most prominent clinical feature. Affected individuals typically present with childhood apraxia of speech (difficulty coordinating the movements needed for speech), expressive language delay, and varying degrees of intellectual disability or learning difficulties. Additional clinical features may include mild to moderate developmental delay, behavioral abnormalities such as features of autism spectrum disorder, and in some cases mild dysmorphic facial features. Motor development may also be delayed. The severity of symptoms can vary depending on the size of the deletion and the specific genes involved. Some patients may have relatively preserved receptive language skills compared to their expressive abilities. There is no specific cure for 7q31 microdeletion syndrome. Management is supportive and multidisciplinary, focusing on early and intensive speech-language therapy, occupational therapy, special educational support, and behavioral interventions as needed. Genetic counseling is recommended for affected families. Diagnosis is typically confirmed through chromosomal microarray analysis (array CGH) or fluorescence in situ hybridization (FISH), which can detect the submicroscopic deletion not visible on standard karyotyping.

Common questions about 7q31 microdeletion syndrome