Pritchett J W
J Hand Surg Am. 1985 Sep;10(5):619-20. doi: 10.1016/s0363-5023(85)80194-5.
True symphalangism is a rigid digit of normal length. Fusion at the proximal interphalangeal joint is most common, and the index finger is the least likely to be affected. I report the second instance of true symphalangism involving fusion of the distal interphalangeal joints of both index fingers without symphalangism of any other digits. This is the first case reported in a black and was inherited as a simple Mendelian dominant trait.
真性并指（趾）畸形是一种长度正常的僵硬手指。近端指间关节融合最为常见，食指受影响的可能性最小。我报告了第二例真性并指（趾）畸形，累及双手食指的远端指间关节融合，而其他手指无并指（趾）畸形。这是首例在黑人中报道的病例，呈简单孟德尔显性性状遗传。
