Acquired Musculoskeletal Dz Flashcards
Cranial cruciate rupture
Intracapsular swelling (effusion or synovial proliferation)
Rad findings of cranial cruciate rupture
Displacement of of infrapatellar fat pad
Displacement of fascial planes cd. to joint
Avulsion fragment in the joint space
Which areas are affected with stifle DJD?
Trochlear groove , patella, fablellae, femoral epicondyles, tibial condyles
Non-erosive polyarthropathy diseases
Immune-mediated: systemic lupus erythematosus (SLE)
Inflammatory: Ticke borne (lyme, rock mountain) and familial shar-pei fever (amyloidosis)
Erosive Polyarthropathy diseases
Immune mediated: rheumatoid arthritis or feline periosteal proliferative arthritis
Non-erosive polyarthropathy
Inflammatory dz of joints without articular damage
Acute non-erosive polyarthropathy
Monoarticular early in dz process
Rad signs may not be present
Chr. non-erosive polyarthropathy
Joint effusion
Normal bones Tarsus, carpus, stifle most commonly affected
Erosive Polyarthropathy
Results in articular cartilage damage
Involves distal extremities
Rheumatoid arthritis (RA)
Young to middle age small and toy breeds
Shetland sheepdogs predisposed
Stifles and elbows involved
Feline periosteal proliferative arthritis
Young male cats most commonly affected
Shoulders, elbows, stifles and hips
Radiographic findings of Erosive Polyarthropathy
Subchondral erosions
Effusion
Joint subluxation
Septic arthritis
Uncommon in SA, common in LA (infectious)
Mono-articular (adults) → direct inoculation (puncture or sx)
Poly-articular (juvenile) → hematogenous
Pathogenesis of septic arthritis
Severe intracapsular effusion → +/- intracapsular gas → cartilage destruction → joint space narrowing (7-10d) → subchondral lysis → +/- concurrent DJD change
Joint associated tumors
Monoarticular
Stifle (most common), elbow, shoulder, caprus, tarsus, hip (less common)
