Coin shaped palques (Discoid Eczema) composed of papules and vesicles on an erythematous base with some excoriations also present.
Nummular Dermatitis Exudative varierty, round erythematous palques (nummulus = coin) covered with numerous weeping vesicles which develop into small crusts.
Nummular Dermatitis Dry variety, several round or oval erythematous plaques, well dermacated and isolated from each other.Their diameter varies from one to several centimeters and they are covered with fine dry scales.
Nummular Eczema Round, eczematous plaques formed on the trunk and arms become confluent.
Nummular Eczema is a common disease of unknown cause that occurs primarily in the middle-aged and elderly. The typical lesion is a coin-shaped, red plaque that averages 1 to 5 cm in diameter. The lesions can itch, and scratching often becomes habitual. In these cases, the term nummular neurodermatitis has been used.
The plaque may become thicker and vesicles appear on the surface; vesicles in ringworm, if present, are at the border. Unlike the thick, silvery scale of psoriasis, this scale is thin and sparse. The erythema in psoriasis is darker. Once the disease is established, lesions may become more numerous, but individual lesions tend to remain in the same area and do not increase in size. The disease is worse in the winter. The back of the hand is the most commonly involved site; usually only one lesion or a few lesions are present.
Other frequently involved areas are the extensor aspects of the forearms and lower legs, the flanks, and the hips. Lesions in these other sites tend to be more numerous. An extensive form of the disease can occur suddenly in patients with dry skin that is exposed to an irritating medicine or chemical, or in patients who have an active eczematous process at another site, such as stasis dermatitis on the lower legs. The lesions in these cases are round, faintly erythematous, dry, cracked, superficial, and usually confluent.