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Surface Change : Scale

A type of surface change. It results from excess stratum corneum (the most superficial layer of the skin) that accumulates in flakes or plates. Scale usually has a white or gray color.

It is important to note whether a raised lesion is scaly or non-scaly, as the differential diagnosis of raised scaly lesions is quite different from that of raised smooth lesions.

Scaly papules in atopic dermatitis

Scaly papules in atopic dermatitis

Thick, white, sharply bordered scaly plaques of psoriasis

Thick, white, sharply bordered scaly plaques of psoriasis

Thick, scaly papules on plantar foot in reactive arthritis

Thick, scaly papules on plantar foot in reactive arthritis

Large annular scaly erythematous plaques typical of tinea faciei

Large annular scaly erythematous plaques typical of tinea faciei