[Extensor injuries at the zone I of the digits].

Injuries of the extensor tendon in zone I are frequently seen. If detected early and treated appropriately they are associated with good functional results. Open injuries are primarily treated surgically by suturing the injured tendon. Closed injuries without bone involvement are treated conservatively. In cases of bone involvement the treatment procedure is determined by the articulation and the extent of fragment displacement. This article presents the current state of knowledge on the diagnostics and treatment of extensor tendon injuries in zone I with the aim of providing treatment recommendations for the clinical routine.