## Overview Degenerative suspensory ligament desmitis (DSLD) is a progressive, systemic disorder of connective tissue that leads to bilateral breakdown of the suspensory ligaments. It is most recognized in Peruvian Pasos but occurs in other breeds. Affected horses develop dropped fetlocks that worsen over time. There is no cure. ## Causes Genetic factors affecting connective-tissue homeostasis are strongly implicated. The condition is not caused by a single traumatic event. ## Diagnosis Clinical appearance of progressive bilateral fetlock dropping, ultrasound showing diffuse suspensory enlargement and fiber disruption in multiple limbs, and exclusion of traumatic injury. ## Treatment Supportive only: controlled exercise or rest during flares, anti-inflammatories, and hoof care. No treatment halts progression. ## Recovery and Prognosis Poor for athletic use. The disease progresses over months to years. Many horses are eventually euthanized for welfare reasons when they can no longer stand comfortably. ## Prevention Avoid breeding affected horses. No other preventive measures are known.
bilateral fetlock dropping; progressive over months to years; pasterns become horizontal; pain and reluctance to move; no response to rest
## Overview Degenerative suspensory ligament desmitis (DSLD) is a progressive, systemic disorder of connective tissue that leads to bilateral breakdown of the suspensory ligaments. It is most recognized in Peruvian Pasos but occurs in other breeds. Affected horses develop dropped fetlocks that worsen over time. There is no cure. ## Causes Genetic factors affecting connective-tissue homeostasis are strongly implicated. The condition is not caused by a single traumatic event. ## Diagnosis Clinical appearance of progressive bilateral fetlock dropping, ultrasound showing diffuse suspensory enlargement and fiber disruption in multiple limbs, and exclusion of traumatic injury. ## Treatment Supportive only: controlled exercise or rest during flares, anti-inflammatories, and hoof care. No treatment halts progression. ## Recovery and Prognosis Poor for athletic use. The disease progresses over months to years. Many horses are eventually euthanized for welfare reasons when they can no longer stand comfortably. ## Prevention Avoid breeding affected horses. No other preventive measures are known.
bilateral fetlock dropping; progressive over months to years; pasterns become horizontal; pain and reluctance to move; no response to rest