This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Brachydactyly type A2 is a very rare condition affecting the middle bone (middle phalanx) of the index finger and the second toe. Typically, people affected by brachydactyly type A2 have very short (hypoplastic) middle bones of these digits. In some individuals, the bone above the middle phalanx (distal phalanx) is shifted as well, so that the fingers and toes may look misshapen. There have not been reports of other symptoms associated with brachydactyly type A2. Typically, brachydactyly type A2 does not require surgery, and affected individuals are able to use their hands normally.
For more information, visit GARD.