A 5-month-old male with moderately brown skin that rarely burns and tans profusely presented to the emergency department with a worsening red rash of more than 4 months' duration. The patient had diffuse erythroderma and eczematous patches and plaques covering 95% of the total body surface area, including lichenified plaques on the arms and elbows, with no signs of infection. He initially presented for his 1-month appointment at the pediatric clinic with scaly patches and plaques on the face and trunk as well as diffuse xerosis. He was prescribed daily oatmeal baths and topical Minerin (Major Pharmaceuticals)-containing water, petrolatum, mineral oil, mineral wax, lanolin alcohol, methylchloroisothiazolinone, and methylisothiazolinone-to be applied to the whole body twice daily. At the patient's 2-month well visit, symptoms persisted. The patient's pediatrician increased application of Minerin to 2 to 3 times daily, and hydrocortisone cream 2.5% application 2 to 3 times daily was added.
WHAT'S THE DIAGNOSIS?a. atopic dermatitis b. chronic plaque psoriasis c. erythrodermic allergic contact dermatitis d. irritant contact dermatitis e. seborrheic dermatitis