A circular plaque with scales and a raised border on the trunk describes which condition?

A circular plaque with scales and a raised border on the trunk describes which condition?

• A. Tinea versicolor
• B. Eczema
• C. Psoriasis
• D. Tinea corporis

Answer: (D)

A circular, well-defined plaque with a raised, scaly border and central clearing on the trunk is the classic presentation of a dermatophyte infection of the body—tinea corporis, or ringworm. The outer edge is the active advancing border where the fungus is invading and producing scale and redness, while the center often looks relatively clear as healing occurs. This ring-like pattern is the hallmark feature that distinguishes it from other common trunk rashes. Tinea versicolor tends to produce patches of color change (lighter or darker areas) rather than a single, well-circumscribed ring with an elevated border. Eczema presents as itchy, inflamed patches that are not organized into a distinct ring with a raised edge. Psoriasis shows thick, well-demarcated plaques with silvery scales, typically in specific areas like elbows and knees, rather than a single annular lesion on the trunk.

A circular, well-defined plaque with a raised, scaly border and central clearing on the trunk is the classic presentation of a dermatophyte infection of the body—tinea corporis, or ringworm. The outer edge is the active advancing border where the fungus is invading and producing scale and redness, while the center often looks relatively clear as healing occurs. This ring-like pattern is the hallmark feature that distinguishes it from other common trunk rashes.

Tinea versicolor tends to produce patches of color change (lighter or darker areas) rather than a single, well-circumscribed ring with an elevated border. Eczema presents as itchy, inflamed patches that are not organized into a distinct ring with a raised edge. Psoriasis shows thick, well-demarcated plaques with silvery scales, typically in specific areas like elbows and knees, rather than a single annular lesion on the trunk.