Which condition is characterized by a ring-shaped lesion with a clear center and red border?

Prepare for the Dermatology PANCE with flashcards and multiple-choice questions. Each question includes hints and detailed explanations. Get exam-ready!

Granuloma annulare is characterized by ring-shaped lesions that typically have a clear center and a raised red, or skin-colored, border. This condition often manifests on the skin, particularly on the hands and feet, and is usually asymptomatic. The presentation of the lesion, with its distinctive morphology, makes it stand out among various dermatological conditions. Granuloma annulare is considered a benign condition and is often self-limiting, resolving without treatment over time.

In contrast, erythema marginatum presents as reddened patches that expand outward, often associated with rheumatic fever, but it does not typically have a clear center. Lichen planus may also present with lesions, but it typically features a polygonal shape with a shiny appearance and may involve a wider area than just a ring. Lyme disease can cause a characteristic "bull's-eye" rash, known as erythema migrans, which has a central clearing but is usually not perfectly ring-shaped and is commonly associated with other systemic symptoms. Thus, the defining features of granuloma annulare specifically align with the description provided in the question.

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