Q87.86

Clinical Causes: Genetic mutations or deletions of the EHMT1 gene on chromosome 9 Inheritence is usually sporadic, but in some cases can be inherited from a parent with the condition De novo mutations, which occur spontaneously rather than being inherited Environmental factors do not directly cause Kleefstra syndrome

Key Symptoms: Distinct facial features, including a broad nasal bridge, deep-set eyes, prominent eyebrows, and a thin upper lip Intellectual disability and developmental delays Low muscle tone (hypotonia) in infancy Seizures in some cases Ear abnormalities and hearing loss Hearing impairments or speech delays Behavioral issues, such as autism spectrum behaviors Sleep disturbances

Diagnosis Path: Diagnosing Kleefstra syndrome involves a combination of clinical evaluations and genetic testing. Healthcare professionals typically review physical features and developmental history and may suggest genetic analysis, such as chromosomal microarray or targeted gene testing, to identify mutations in the EHMT1 gene. Early diagnosis is essential for managing symptoms and providing appropriate support and interventions.

Treatment Protocols: There is no cure for Kleefstra syndrome; treatment focuses on managing symptoms and supporting development. Multidisciplinary approaches often include: - Speech, occupational, and physical therapy to enhance communication, motor skills, and daily living capabilities - Educational interventions tailored to individual learning needs - Medical management of seizures or other associated health issues - Regular monitoring for health complications such as ear infections or sleep problems - Behavioral therapy to support social skills and manage behavioral challenges While treatments can improve quality of life, they do not alter the underlying genetic cause of the syndrome.