Diseases of joints Flashcards
1
Q
4 categories of joint diseases
A
- developmental
- degenerative
- inflammatory
- neoplastic
2
Q
3 types of developmental disturbances
A
- luxations/subluxations
- hip dysplasia
- arthrogryposis
3
Q
luxation v subluxatin
A
- luxation: complete dislocation of a joint
- subluxation: partial dislocation of a joint
4
Q
patellar luxations
A
- common in dogs, sometimes in horses
- most associated with anatomical defects (inherited)
- medial luxations most common (small dogs), lateral luxations in larger dogs and horses
5
Q
hip dysplasia
A
- large dogs, sometimes cattle
- may be a manifestation of osteochondrosis
- normal at birth, may see microscopic lesions as early as 30 days
- retarded development of craniodorsal acetabular rim –> acetabulum becomes shallow, distorted, wide
- degenerative changes present by 5-8mo, may lead to osteoarthritis
6
Q
lesions in hip dysplasia
A
- osteophytes
- cartilage ulceration
- eburnation of bone
- distortion of acetabulum, head, neck of femur
7
Q
arthrogryposis
A
- persistent flexure or contracture of a joint
- cause unclear –> loss of motion of fetus during development
8
Q
osteoarthrosis/itis
A
- common disorder
- not driven by inflammation
- joint fluid initially normal, chronicity leads to joint deterioration
9
Q
primary arthropathies
A
- cause is unknown
- ringbone, spavin, navicular, arthropathy of shoulder or stifle
10
Q
secondary arthropathies
A
- secondary to a known cause
- osteochondrosis, previous trauma
11
Q
vulnerability to degenerative joint disease
A
- larger joints usually the first to show degenerative changes and are most severely affected
- in individual joints, the areas of cartilage that bear the most stress are the most vulnerable
12
Q
lesions of degenerative joint disease
A
- fibrillation, clefting, loss of articular cartilage
- increased thickness of subchondral bone (eburnation)
- osteophytes (increased size of joint)
- thickened joint capsule (fibrous tissue) with synovial proliferation
13
Q
ringbone, spavin, navicular
A
- common horse disorders
- all develop at site of high or sustained mechanical loading
- ringbone: interphalangeal joints
- spavin: intertarsal joints
- navicular: navicular bones
- full thickness necrosis of cartilage covering bone surfaces at sites of sustained compression
- remodeling of subjacent subcondral bone
- penetration of cartilage by granulation tissue arising from remodeling response in subchondral bone
14
Q
arthropathy of canine shoulder
A
- common in middle aged to old dogs
- bilateral, slow-developing lesions
- cartilage ulceration, eburnation, thickening of joint capsule, villous proliferation of synovium
- osteophytes
15
Q
arthropathy of bovine stifle
A
- lameness and muscle atrophy in mature dairy cows
- bilateral lesions
- cartilage degeneration, eburnation, osteophyte development
- most severe in medial aspect of distal femur