Which joint is commonly affected by septic arthritis in individuals using IV drugs?

The sternoclavicular joint is a common site for septic arthritis, particularly in individuals using intravenous (IV) drugs. This susceptibility is often due to the anatomical location of the joint, as it is near the central vascular structures and can become infected when contaminants enter the bloodstream, especially during practices associated with IV drug use.

In IV drug users, the technique of injecting substances can introduce bacteria into the body, leading to infection. The sternoclavicular joint is less commonly associated with typical activities that might lead to septic arthritis compared to weight-bearing joints, but the unique risk factors associated with IV drug use make it a significant joint for infection due to its proximity to venous access points.

The other joints mentioned, while they can develop septic arthritis, are not as commonly affected in this population specifically due to IV drug use practices. Understanding the particular vulnerabilities of certain joints in relation to drug use is crucial for early diagnosis and treatment of septic arthritis.