Trisomy 17p syndrome

Trisomy 17p syndrome (also known as partial trisomy 17p or duplication 17p) is a rare chromosomal disorder caused by the presence of an extra copy of the short arm (p) of chromosome 17, resulting in three copies of genetic material from this region instead of the usual two. This chromosomal imbalance is classified under partial trisomies of autosomes (ICD-10: Q92.2). The condition affects multiple body systems and is typically recognized at birth or during early infancy due to characteristic clinical features. Key clinical features of trisomy 17p syndrome include intellectual disability of variable severity, developmental delay, distinctive craniofacial features (such as a broad forehead, flat nasal bridge, short nose, thin upper lip, and low-set ears), and growth retardation. Affected individuals may also present with hypotonia (reduced muscle tone), feeding difficulties in infancy, skeletal anomalies, and congenital heart defects. Seizures have been reported in some cases. The severity and range of symptoms can vary depending on the size and exact location of the duplicated segment on chromosome 17p. There is currently no cure for trisomy 17p syndrome, and management is supportive and symptomatic. Treatment typically involves a multidisciplinary approach including early intervention programs, physical therapy, occupational therapy, speech therapy, and special education services. Cardiac anomalies and other organ-specific complications are managed by appropriate specialists. Regular developmental assessments and monitoring for associated complications are recommended throughout the patient's life.

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