Identify the morphology of skin lesion shown in the image:
Morphology of Skin Lesions
- Macules are flat, nonpalpable lesions usually < 10 mm in diameter. Macules represent a change in color and are not raised or depressed compared to the skin surface. A patch is a large macule.
- Papules are elevated lesions usually < 10 mm in diameter that can be felt or palpated.
- Plaques are palpable lesions > 10 mm in diameter that are elevated or depressed compared to the skin surface. Plaques may be flat topped or rounded. Lesions of psoriasis and granuloma annulare commonly form plaques.
- Nodules are firm papules or lesions that extend into the dermis or subcutaneous tissue.
- Vesicles are small, clear, fluid-filled blisters < 10 mm in diameter.
- Bullae are clear fluid-filled blisters > 10 mm in diameter.
- Pustules are vesicles that contain pus.
- Urticaria (wheals or hives) is characterized by elevated lesions caused by localized edema. Wheals are pruritic and red.
- Scale is heaped-up accumulations of horny epithelium .
- Crusts (scabs) consist of dried serum, blood, or pus.
- Erosions are open areas of skin that result from loss of part or all of the epidermis.
- Ulcers result from loss of the epidermis and at least part of the dermis.
- Petechiae are nonblanchable punctate foci of hemorrhage.
- Purpura is a larger area of hemorrhage that may be palpable.
- Atrophy is thinning of the skin, which may appear dry and wrinkled.
- Scars are areas of fibrosis that replace normal skin after injury. Some scars become hypertrophic or thickened and raised. Keloids are hypertrophic scars that extend beyond the original wound margin.
- Telangiectases are foci of small, permanently dilated blood vessels .