Subcorneal pustular dermatosis (of Sneddon-Wilkinson)

18. Eosinophilic folliculitis (Ofugi's disease)

Hidradenitis suppurativa

Folliculitis decalvans

Secondary Lesions

• Scar - a hard plaque of dense fibrotic tissue covered by a thin epidermis. A mark of injury from any sort of process (physical or pathologic).
• Atrophy - Atrophy usually refers to thinning of the epidermis leaving an easily wrinkled and/or shiny surface. Atrophy may also apply to dermal and/or subcutaneous tissue, with or without changes in the epidermis.
• Ulcer - loss of skin tissue or substance from the surface downward, leaving an uncovered or denuded wound that is slow to heal.
• Erosion - a superficial denudation of the skin, usually implying the loss of the epidermis.
• Fissure - a vertical splitting or separation of the skin.
• Crust - dried surface fluid, often serous (inspissated serum) in nature, with or without tissue debris. For purposes of this document this includes the term "scab".
• Excoriation - a scratch mark, often with denudation of the skin to form a small ulcer. Exposure of the corium by mechanical removal of the epidermis.
• Scale - a thin flake of epithelium (mostly composed of corneoctyes) which is separated from the underlying intact skin proper.
• Lichenification - a thickening of the skin surface and an increase of skin markings, usually seen with chronic coalescence of papular lesions, especially atopic eczema.
• Vegetating - a lushly growing, proliferating, process, usually with elevated or exophytic features.
• Linear / Figurate - technically not secondary features, but included here solely out of convenience. These are configurations that skin lesions may assume, which aid in their diagnostic identification. Figurate includes geometrical shapes (e.g. annular, arciform, cyclic, etc.).

Date: 2015-01-11; view: 921