Osler’s nodes are seen at –
**Core Concept**
Osler's nodes are painful, indurated lesions that occur on the skin, typically on the toes or hands, as a manifestation of a systemic condition. They are associated with vasculitis and endothelial damage.
**Why the Correct Answer is Right**
Osler's nodes are a hallmark of subacute bacterial endocarditis (SBE), a complication of infective endocarditis. They result from the sequestration of platelets and leukocytes in the small blood vessels of the skin, leading to inflammation and tissue damage. The affected vessels are typically those with turbulent blood flow, such as the small arteries and arterioles in the skin.
**Why Each Wrong Option is Incorrect**
**Option A:** While Osler's nodes can be seen in other conditions, such as vasculitis and thromboembolic disease, they are most classically associated with SBE.
**Option B:** This option is incorrect because Osler's nodes are not typically seen in rheumatic heart disease.
**Option C:** This option is incorrect because Osler's nodes are not a characteristic finding in systemic lupus erythematosus.
**Clinical Pearl / High-Yield Fact**
Osler's nodes should prompt a thorough investigation for endocarditis, including blood cultures, echocardiography, and serological tests.
**Correct Answer:** D.