Dermatological dichotomy: Atopic dermatitis or mycosis fungoides?

The presence of atopic dermatitis (AD) and mycosis fungoides (MF) presents diagnostic challenges due to their shared clinical features. AD, a chronic skin disorder characterized by pruritic and inflamed lesions, shares these features with MF, which is the most common cutaneous T-cell lymphoma. A 19-year-old male, who had a history of childhood AD, developed eczema-like lesions on his forearms, neck, and head.