TABLE 2373 Lesion Configuration Descriptors

Recognition of the primary lesion is vital in establishing the diagnosis. The primary lesion is the lesion which has not been altered by secondary issues, including healing, complicating infection, medication application, or scratching. Examples of primary skin lesions include macules, papules, nodules, tumors, cysts, plaques, wheals, vesicles, bullae, and pustules. Secondary lesions have had their appearance altered due to disease evolution or various external factors as noted above, and include crusts, scales, fissures, erosions, ulcerations, excoriations, atrophy, scarring, and lichenification. See T.aMe.237-4 for a listing with description of the various morphologic descriptors of dermatologic lesions; refer to Ia.ble 23.7.:§. and T§b.!e...2.37:6 for a differential diagnosis of the various skin disorders relative to primary and secondary lesion morphologies that can use the "Burn rule of 9's" ( Chap 194, "Thermal Burns") to estimate the degree of skin involvement.

TABLE 237-4 Lesion Morphology

TABLE 237-5 Differential Diagnosis of Selected Skin Disorders Relative to Primary Lesion Morphology

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