The clinical presentation of greasy, yellowish scales on an erythematous base, affecting seborrheic areas like the scalp, eyebrows, and nasolabial folds, is classic for seborrheic dermatitis. Psoriasis typically presents with silvery scales and well-demarcated plaques. Atopic dermatitis is characterized by intense pruritus and often affects flexural areas. Contact dermatitis usually has a clear history of exposure to an irritant or allergen and can present with vesicles or bullae.
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