William B. Henry, Jr. DVM, DACVS

Degenerative Lumbosacral Stenosis (aka Lumbosacral Disease, Cauda Equina Disease, L7-S1 Instability) is the most commonly missed cause of hind leg pain and/or lameness/weakness in the middle to older aged dog.
Signalment: This disease occurs in medium to large breed dogs more commonly but it is occasionally seen in toy breeds as well. The presenting complaint by the owner can range from an acute non-weight bearing lameness following strenuous exercise to intermittent transient pain/lameness following or during mild to moderate exercise.

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