Fibrotic Myopathy

Fibrotic Myopathy



Basic Information image



Definition


A mechanical lameness characterized by an abrupt shortening of the forward swing of one or both pelvic limbs with a characteristic “slapping” of the affected hoof onto the ground



Synonym(s)


Ossifying myopathy



Epidemiology



Species, Age, Sex




• Horses: Average age of 8.7 years in one study and 11.8 years in another study


• Mares are overrepresented in one study



Genetics and Breed Predisposition


Quarter Horse–related breeds are predisposed because of Western performance activities.



Risk Factors




• Overstretching trauma to the thigh musculature associated with reining maneuvers such as sliding stops


• Abscesses, injection reactions, or wounds in the semitendinosus muscle



Associated Conditions and Disorders


An identical gait can be seen with hind limb denervating disease such as equine motor neuron disease and peripheral neuropathy and with myopathies such as polysaccharide storage myopathy.



Clinical Presentation



Disease Forms/Subtypes




• Most often affects the distal semitendinosus muscle with occasional involvement of the gracilis, biceps femoris, and semimembranosus muscles.


• Unilateral signs are most often caused by trauma, although early peripheral neuropathy is still possible.


• If bilateral, consider an underlying denervation or myopathy.



History, Chief Complaint


Prior trauma resulting in increased muscle tension (eg, sliding stops, slipping, catching a hind leg in a halter) or localized muscle damage caused by wounds or injections

< div class='tao-gold-member'>

Related posts:

  1. Motor Neuron Disease, Equine
  2. Hematuria
  3. Polyarthritis and Polysynovitis
  4. False Dandelion/Flat Weed Toxicosis

Stay updated, free articles. Join our Telegram channel
Tags:
Jul 24, 2016 | Posted by in SMALL ANIMAL | Comments Off on Fibrotic Myopathy

Full access? Get Clinical Tree
Get Clinical Tree app for offline access