Many people with Poland syndrome have hand abnormalities, commonly including an underdeveloped hand with abnormally short fingers (brachydactyly); small, underdeveloped (vestigial) fingers; and some fingers that are fused together (syndactyly). This combination of hand abnormalities is called symbrachydactyly. Some affected individuals have only one or two of these features, or have a mild hand abnormality that is hardly noticeable. The bones of the forearm (radius and ulna) are also shortened in some people with Poland syndrome, but this shortening may also be difficult to detect unless measured. Depending on their severity, hand and finger abnormalities may cause problems with use of the hand.