Developmental orthopaedic disease (Yr 3) Flashcards
what dogs is hypertrophic osteopathy seen in?
2-8 month old large breeds
what are the suspected causes of hypertrophic osteodystrophy?
idiopathic
suspect infection, over supplementation or vascular abnormalities
what are the clinical signs of hypertrophic osteodystrophy?
lameness, fever, lethargy, painful bone
bilateral and symmetrical disease
what are the radiographic abnormalities seen with hypertrophic osteodystrophy?
abnormal bone on diaphysial side of physis
decreased radio density parallel to physis
irregular widening of physis
new bone formation
how is hypertrophic osteodystrophy treated?
self limiting
(supportive therapy)
what dogs are affected by panosteitis?
5-18 month old large breed dogs
rapidly growing breeds (males>females)
what is the pathogenesis of panosteitis?
fibrosis of bone tissue from increased osteoblastic and fibroblastic activity leading to a disorganised trabecular formation of the subchondral bone
what are the clinical signs of panosteitis?
acute shifting lameness, lethargy, pain
what radiographic abnormalities are seen with panosteitis?
increased opacity of medullary cavity
indistinct trabecular pattern
increased endosteal opacity
how is panosteitis treated?
self limiting
(supportive treatment)
what dogs is legg-calve-perthes disease seen in?
4-11 month old toy breeds
what is the pathogenesis of legg-calve-perthes disease?
avascular necrosis of femoral head
initial bone is mechanically stable and then collapses at the articular surface
what are the radiographic abnormalities seen with legg-calve-perthes disease?
osteolysis of femoral head
collapsed and thickened femoral neck
fracture
how is legg-calve-perthes disease treated?
femoral head and neck excision
what is the cause of hip dysplasia in dogs?
genetic predisposition to laxity of the coxofemoral joint
abnormal anatomy of femoral head and acetabulum
