The 8 Zones of Extensor Tendon Injuries

Zone 1 is characterized with disruption of the terminal extensor tendon distal 2 or at the DIP joint of the fingers and IP joint of the thumb, which involves the EPL. Zone 3 injuries are known as a boot near deformity. Know that fight bites are common in Zone 5 but you can also have a sagittal band rupture. zone 6 is characterized by disruption over the metacarpal and know that nerve and vessel injury is likely.zone 7 is disruption at the wrist joint and you must repair the retinaculum to prevent bow strain. Finally, zone 8 injuries are characterized with disruption at the distal forearm - usually from penetrating trauma.