<prompt> Coin shaped eczema is :Nummular eczemaAtopic ecemaInfantile eczemaEndogenous eczema  <response>: A. i.e. Nummular eczema Circular or oval coin shaped lesionsQ are seen in nummular discoid eczema. Dermatitis Eczema Nummular Discoid Eczema More frequently a disease of middle aged adult 50-65 years men. However a second peak around 15-25 years in women and rarely childhood onset at 5 years age is also seen. Dry skin in elderly is a contributory factor. Diagnostic lesions is a well demarcated, coin shaped eryrhematous plaqueQ arising, quite rapidly, from the confluence of tiny, closely set, thin walled papules and papulovesicles. Pin point oozing, crusting and scaling eventuate. Pruritis varies from severe in acute phase to minimal. Later central clearing resolution and peripheral extension leads to annular or ring shaped lesions. Secondary lesions in a mirror-image configuration on opposite side of body and reactivation of apparently dominant lesions paicularly on premature discontinuation of treatment is very characteristic. Common locations are trunk or extensor surfaces of extremities, paicularly on the pretibial areas in men or dorsal aspects of hands in women. Differential Diagnosis: Contact dermatitis should be suspected in chronic recalcitrant and unusually severe case where patches are few, asymmetrical and of unusual configuration. Psoriasis has usually more well defined, thickened, scaly and more number of plaques. Bowens disease usually has 1 or 2 red, scaly patches mostly restricted to light exposed areas. Treatment is similar to that of atopic dermatitis. Contact Dermatitis I. Air borne C.D.Q - Is due to pahenium congress grassQ II. Primary irritant C.D - Due to direct contact with toxic irritating materialQ - Palmar surface of handsQ are m.c. involved III. Allergic C.D. - Due to contact with an agent to which delayed hypersensitivity has developed. - Ex-Nickel m.c.Q dye, cosmetics, local anesthetic. Seborrheic Dermatitis Occurs on hairy sites, flexures or on central trunk. It is chracterized by: Itching or burning Severe dandruffQ Greasy yellow scalesQ over erythematous patch stuck on appearance Cradle capQ is seen in pityriasis capitis complicated by seborrheic dermatitis. 