| Holt-Oram syndrome is the most common form of heart-hand syndrome with characteristics of skeletal abnormalities of the upper limbs and mild-to-severe congenital cardiac defects. The clinical picture of covers a wide spectrum of upper extremity defects, always including the radial ray, and cardiac defects. Caused by a mutation in the TBX5 gene located on the long arm of chromosome 12 (12q24.1). |
