Chapter 89 - OCD Flashcards
What does “osteochondritis dissecans” mean?
Inflammation of bone and cartilage resulting in loose fragments.
What condition is most commonly associated with osteochondrosis in horses?
Developmental orthopedic disease (DOD).
What does the term “osteochondrosis” refer to?
A disorder of bone development in growing horses.
What is the primary characteristic of “osteochondritis dissecans”?
Cartilaginous or osteochondral separation.
What does “OC latens” represent?
Focal chondronecrosis in the growth cartilage.
What does “OC manifesta” indicate?
Impaired endochondral ossification and cartilage retention.
What does “OC dissecans” describe?
Cleft formation in necrotic cartilage.
What are examples of JOCC?
OCD, cuboidal bone disease, and other immature skeletal failures.
What term includes disorders related to immature joints or growth plates?
Juvenile osteochondral conditions (JOCC).
What is “endochondral ossification”?
The process of bone development from cartilage.
At what stage does endochondral ossification begin?
Fetal stage.
What is Wolff’s law?
Bone remodels in response to biomechanical load.
Where does longitudinal growth of long bones occur?
At growth plates or physe
What is the typical presentation of an OC patient?
A yearling with joint effusion, usually without lameness.
Which breed shows a high prevalence of OC in the tarsocrural joint?
Warmbloods and Standardbreds.
Which advanced imaging modalities outperform radiography?
Computed tomography (CT) and magnetic resonance imaging (MRI).
What is the role of radiography in diagnosing OC?
It’s the gold standard for detecting OC lesions.
Which joint commonly shows evidence of OC on radiographs?
The tarsocrural or femoropatellar joint.
What joints are most affected by OC in horses?
Tarsocrural, femoropatellar, and MCP/MTP joints.
What is a limitation of radiography for OC?
It may miss lesions limited to cartilage or subtle bone changes.
What joints are most often affected bilaterally by OC?
Tarsocrural and femoropatellar joints.
What is a predilection site for OC in the tarsocrural joint?
Distal intermediate ridge of the tibia.
What is the common location of OC in the shoulder joint?
The glenoid and humeral head.
Where are OC lesions commonly found in the femoropatellar joint?
Lateral trochlear ridge of the femur.