Which of the following is NOT a cause of interarticular adhesion?

• A. Acute trauma
• B. Chronic repetitive stress
• C. Genetics
• D. Internal derangement

Answer: (C)

Interarticular adhesions refer to fibrous connections that can develop within a joint, leading to restriction in joint movement and function. Among the various options given, genetics is not typically described as a direct cause of interarticular adhesion.

Acute trauma can lead to injury and inflammation, which may result in the formation of adhesions as part of the healing process. Similarly, chronic repetitive stress can cause microtrauma to the joint structures over time, predisposing them to adhesions due to ongoing inflammation and healing responses. Internal derangement, such as displacement of cartilage or menisci within a joint, can also cause alterations in joint mechanics, potentially leading to adhesion formation.

Genetics, while it can influence an individual's predisposition to certain musculoskeletal conditions, does not directly cause interarticular adhesions. Instead, the conditions leading to adhesions are primarily mechanical and relate to injury and stress on the joint apparatus, not hereditary factors.