Case Presentation: A 66-year-old man with atopic dermatitis (managed with topical triamcinolone) presented with three weeks of a diffuse pruritic eczematous rash, anorexia, and a 15-lb weight loss. Vital signs were normal, but he was cachectic (BMI 15) with palpable inguinal lymphadenopathy and erythroderma affecting over 90% of his body. He was admitted for inability [...]