Osler’s nodes are typically seen in which one of the following –
**Core Concept**
Osler's nodes are painful, indurated lesions that occur on the skin, often associated with infective endocarditis and other conditions that lead to immune complex deposition and vasculitis.
**Why the Correct Answer is Right**
Osler's nodes are thought to result from the deposition of immune complexes in the small blood vessels of the skin, leading to inflammation and tissue damage. This process is often seen in conditions such as infective endocarditis, where the body's immune response to the infection leads to the formation of immune complexes that can cause damage to various tissues, including the skin. The lesions are typically found on the skin of the hands and feet.
**Why Each Wrong Option is Incorrect**
**Option A:** While Osler's nodes can be seen in conditions that cause vasculitis, they are not typically associated with rheumatoid arthritis.
**Option B:** Osler's nodes are not typically seen in conditions that cause direct damage to the skin, such as dermatomyositis.
**Option C:** While Osler's nodes can be seen in conditions that cause immune complex deposition, they are not typically associated with systemic lupus erythematosus.
**Clinical Pearl / High-Yield Fact**
Osler's nodes are a classic example of a "vasculitic lesion" that can occur in a variety of conditions, and their presence should prompt a search for underlying conditions such as infective endocarditis.
**Correct Answer: C. Endocarditis.**