The term "curb" is used to describe a number of soft tissue injuries that cause swelling on the distal plantar aspect of the tarsus in horses (see curb image). Historically, the term described enlargement of the (long) plantar ligament on the plantar aspect of the calcaneus; however, curblike swelling can also be caused by peritendinous-periligamentous inflammation, superficial or deep digital flexor tendinitis, or a combination of injuries.
Courtesy of Dr. Hilary Rice.
Curb is primarily an injury of racehorses, particularly Standardbreds, and conformational abnormalities can predispose horses to the condition. Lameness varies from absent to severe, depending on the structure involved and the extent of the injury.
Diagnosis of the exact nature of a curb injury is confirmed by ultrasonography. In most cases, treatment involves local anti-inflammatory therapy and NSAIDs in the acute phase, followed by rest and a controlled exercise program.
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Also see pet owner content regarding disorders of the tarsus in horses.
