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Erosion: An erosion is a discontinuity of the skin exhibiting incomplete loss of the epidermis, [32] a lesion that is moist, circumscribed, and usually depressed. [21] [33] Excoriation: A punctate or linear abrasion produced by mechanical means (often scratching), usually involving only the epidermis, but commonly reaching the papillary dermis ...
Histopathological image of dyshidrotic dermatitis, showing focal spongiotic change in the epidermis. Spongiosis is mainly intercellular [1] edema (abnormal accumulation of fluid) in the epidermis, [2] and is characteristic of eczematous dermatitis, manifested clinically by intraepidermal vesicles (fluid-containing spaces), "juicy" papules, and/or lichenification. [3]
Rare causes of skin ulcers include pyoderma gangraenosum, lesions caused by Crohn's disease or ulcerative colitis, granulomatosis with polyangiitis, morbus Behçet and infections that are usually seen in those who are immunocompromised, for example ecthyma gangraenosum.
It causes the epidermis to be invaded by macrophages, which leads to epidermal erosion. T-cells are also activated as a result of imiquimod treatment. Imiquimod appears to promote an "immune memory" that reduces the recurrence of lesions. There is minimal scarring. Complete clearance has been demonstrated in up to 45% of patients with actinic ...
Schematic image comparing a skin fissure to an erosion and an ulcer. The surface of the knuckles of a hand with xeroderma, showing skin cracking (generalized skin fissuring). A skin fissure is a cutaneous condition in which there is a linear-like cleavage of skin, sometimes defined as extending into the dermis. [1] It is smaller than a skin ...
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Diagramatic representation of mucosal erosion (left), excoriation (center), and ulceration (right) Simplistic representation of the life cycle of mouth ulcers. An ulcer (/ ˈ ʌ l s ər /; from Latin ulcus, "ulcer, sore") [2] is a break in the skin or mucous membrane with loss of surface tissue and the disintegration and necrosis of epithelial tissue. [3]
A Cameron lesion is a linear erosion or ulceration of the mucosal folds lining the stomach where it is constricted by the thoracic diaphragm in persons with large hiatal hernias. [1] The lesions may cause chronic blood loss resulting in iron deficiency anemia ; less often they cause acute bleeding.