Morphology of Secondary Skin Lesions - Description Algorithm

Secondary Skin Lesion - Lesion that develops from trauma, manipulation (rubbing, scratching), complication (infection) of initial lesion, or develops naturally over time

Elevated Secondary Skin Lesion 

 • Crust/Scab (dried serum, blood, or pus overlying the lesion)

 • Scale (dry, thin or thick flakes of skin overlying the lesion)

 • Lichenification (thickened skin with accentuation of normal skin lines)

 • Hypertrophic Scar (within boundary of injury)

 • Keloid Scar (extend beyond boundary of injury)

Depressed Secondary Skin Lesion 

 • Atrophic Scar (fibrotic replacement of tissue at site of injury)

 • Ulcer (complete loss of epidermis extending into dermis or deeper; heals with scar)

 • Erosion (partial loss of epidermis only; heals without scar)

 • Fissure (linear slit-like cleavage of skin)

 • Excoriation/Scratch (linear erosion induced by scratching)



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