SKIN LESION (PRIMARY SKIN)

Skin Lesion • Macule (≤ 1 cm diameter) • Patch (> 1 cm diameter) Secondary Skin Lesion Lesion that develops from trauma, manipulation (rubbing, scratching), complication (infection) of initial lesion, or develops naturally over time Primary Skin Lesion Initial lesion not altered by trauma, manipulation (rubbing, scratching), complication (infection), or natural regression over time. Flat Elevated Solid Fluid-Filled OR Semi-Solid-Filled Fluid-Filled No Deep Component Deep Component Purulent Non-Purulent Fluid Firm/Edematous Transient/Itchy • Cyst • Papule (≤ 1 cm diameter) • Plaque (> 1 cm diameter) • Nodule (1-3 cm diameter) • Tumor (> 3 cm diameter) • Vesicle (≤ 1 cm diameter) • Bulla (> 1 cm diameter) • Pustule • Wheals/Hives Rash: Morphology of skin lesions: primary skin lesions Author: The Calgary Blackbook, 10th edition *Indicates Key Condition This is not an exhaustive list of medical conditions.