This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Brachydactyly type C is a very rare congenital condition that is characterized by shortening of certain bones in the index, middle and little fingers. The bones of the ring finger are typically normal. Other abnormalities may also be present such as hypersegmentation (extra bones) of the index and middle fingers; ulnar deviation (angled towards the fifth finger) of the index finger; and unusually-shaped bones and/or epiphysis (end of a long bone). Brachydactyly type C is typically caused by changes (mutations) in the GDF5 gene and is inherited in an autosomal dominant manner. Treatment varies based on the severity of the condition. Physical therapy and/or plastic surgery may be indicated if the condition affects hand function.
For more information, visit GARD.