Distal finger symphalangism The term distal symphalangism refers to a bony fusion of the distal and middle phalanges of the digits of the hand, in other words the distal interphalangeal joint (DIJ) is missing which can be seen either on x-rays or as an absence of the distal interphalangeal finger creases. Distal symphalangism of hands HP:0006116 HP:0006079 Symphalangism affecting the distal phalanges of the hand HP:0009841 HP:0009871 Synostosis of distal phalanges HP:0001204 Terminal symphalangism Finger symphalangism Abnormal distal phalanx morphology of finger Distal symphalangism fused distal phalanx of manus and middle phalanx of manus