Canadian Medical Guide > Diseases > Skin and Connective Tissue Diseases > Skin Diseases > Dermatitis Terms and Definitions

Dermatitis

Medical Definition:	Any inflammation of the skin.
Guide Notes:	any skin inflamm; /chem ind = DERMATITIS MEDICAMENTOSA see DRUG ERUPTIONS or DERMATITIS, CONTACT

Dermatitis Categories.

	Dermatitis Herpetiformis - Rare, chronic, papulo-vesicular disease characterized by an intensely pruritic eruption consisting of various combinations of symmetrical, erythematous, papular, vesicular, or bullous lesions. The disease is strongly associated with the presence of HLA-B8 and HLA-DR3 antigens. A variety of different autoantibodies has been detected in small numbers in patients with dermatitis herpetiformis.
	Dermatitis, Contact - A type of acute or chronic skin reaction in which sensitivity is manifested by reactivity to materials or substances coming in contact with the skin. It may involve allergic or non-allergic mechanisms.
	Dermatitis, Exfoliative - The widespread involvement of the skin by a scaly, erythematous dermatitis occurring either as a secondary or reactive process to an underlying cutaneous disorder (e.g., atopic dermatitis, psoriasis, etc.), or as a primary or idiopathic disease. It is often associated with the loss of hair and nails, hyperkeratosis of the palms and soles, and pruritus. (From Dorland, 27th ed)
	Dermatitis, Perioral - A papular eruption of unknown etiology that progresses to residual papular erythema and scaling usually confined to the area of the mouth, and almost exclusively occurring in young women. It may also be localized or extend to involve the eyelids and adjacent glabella area of the forehead (periocular dermatitis). (Dorland, 28th ed)
	Dermatitis, Seborrheic - A chronic inflammatory disease of the skin of unknown etiology. It is characterized by moderate erythema, dry, moist, or greasy scaling, and yellow crusted patches on various areas, especially the scalp. On the scalp, it generally appears first as small patches of scales, progressing to involve the entire scalp with exfoliation of excessive amounts of dry scales (dandruff).
	Drug Eruptions - Adverse cutaneous reactions caused by ingestion, parenteral use, or local application of a drug. These may assume various morphologic patterns and produce various types of lesions.
	Eczema - A pruritic papulovesicular dermatitis occurring as a reaction to many endogenous and exogenous agents (Dorland, 27th ed).
	Intertrigo - A superficial dermatitis occurring on skin surfaces in contact with each other, such as the axillae, neck creases, intergluteal fold, between the toes, etc. Obesity is a predisposing factor. The condition is caused by moisture and friction and is characterized by erythema, maceration, burning, and exudation.
	Neurodermatitis - An extremely variable eczematous skin disease that is presumed to be a response to prolonged vigorous scratching, rubbing, or pinching to relieve intense pruritus. It varies in intensity, severity, course, and morphologic expression in different individuals. Neurodermatitis is believed by some to be psychogenic. The circumscribed or localized form is often referred to as lichen simplex chronicus.
	Radiodermatitis - A cutaneous inflammatory reaction occurring as a result of exposure to ionizing radiation.

Dermatitis Medical Definitions and Terms

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