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Archive Case #182: Equine Superficial Digital Flexor Tendinopathy

Horse veterinary case - Medium - September 1, 2026

Clinical Clues

  1. A performance horse develops acute swelling down the back of the cannon region after fast work.
  2. The rider reports a sudden drop in performance and mild lameness rather than complete non-weight bearing.
  3. Palpation identifies heat, pain, and a convex swelling along the back of the cannon region.
  4. The lesion is worse in the mid metacarpal soft tissues.
  5. Ultrasound confirms fibre disruption within the affected longitudinal structure.
  6. Injury to the superficial digital flexor tendon is a common cause of bowed tendon in horses.

Diagnosis

Equine Superficial Digital Flexor Tendinopathy

This case is most consistent with Equine Superficial Digital Flexor Tendinopathy because the horse has a bowed painful tendon with ultrasound-confirmed fibre disruption after work. The most important clues are the classic location and tendon swelling pattern, which make a suspensory lesion less likely.

Learning review

Review the case evidence

Use the paired clues to explain how the evidence in this horse case supports the provided diagnosis, Equine Superficial Digital Flexor Tendinopathy, then compare your reasoning with the case explanation.

Evidence checkpoints

Clues 1-2

  1. Clue 1: A performance horse develops acute swelling down the back of the cannon region after fast work.
  2. Clue 2: The rider reports a sudden drop in performance and mild lameness rather than complete non-weight bearing.

Clues 3-4

  1. Clue 3: Palpation identifies heat, pain, and a convex swelling along the back of the cannon region.
  2. Clue 4: The lesion is worse in the mid metacarpal soft tissues.

Clues 5-6

  1. Clue 5: Ultrasound confirms fibre disruption within the affected longitudinal structure.
  2. Clue 6: Injury to the superficial digital flexor tendon is a common cause of bowed tendon in horses.

Self-review prompts

  1. After clues 1-2, what evidence from this horse case shaped your initial interpretation?
  2. When you compare clues 3-4 with clues 1-2, what changed in your reasoning about Equine Superficial Digital Flexor Tendinopathy?
  3. How do clues 5-6 align with the case explanation for Equine Superficial Digital Flexor Tendinopathy?

Educational Use

Vetdle archive cases are educational veterinary games for diagnostic reasoning practice. They do not provide veterinary advice, diagnosis, treatment, or professional medical guidance.