## Overview Laceration of the extensor tendons on the dorsal cannon or pastern prevents normal limb protraction, causing knuckling or toe dragging. These injuries commonly result from wire cuts or interference wounds. ## Causes Sharp trauma severing the common or lateral digital extensor tendon. ## Diagnosis Visible wound plus functional deficit (knuckling). Ultrasound assesses the extent of tendon damage. ## Treatment Wound care, antibiotics, and external support (splint or cast) to maintain extension while the tendon heals. Surgical repair is performed in some cases. ## Recovery and Prognosis Fair to good with proper support. Complete severance has a more guarded functional outcome. ## Prevention Safe fencing and protective boots when indicated.
inability to extend the digit; knuckling; toe dragging; wound on the front of the cannon or pastern
## Overview Laceration of the extensor tendons on the dorsal cannon or pastern prevents normal limb protraction, causing knuckling or toe dragging. These injuries commonly result from wire cuts or interference wounds. ## Causes Sharp trauma severing the common or lateral digital extensor tendon. ## Diagnosis Visible wound plus functional deficit (knuckling). Ultrasound assesses the extent of tendon damage. ## Treatment Wound care, antibiotics, and external support (splint or cast) to maintain extension while the tendon heals. Surgical repair is performed in some cases. ## Recovery and Prognosis Fair to good with proper support. Complete severance has a more guarded functional outcome. ## Prevention Safe fencing and protective boots when indicated.
inability to extend the digit; knuckling; toe dragging; wound on the front of the cannon or pastern