A 60 year-old man who has a 10 year history of Parkinson disease presents with a chief complaint of “flaking skin that just does not go away, sometimes worse, sometimes better”, stating this problem has been present for > 6 years. Concurrent health issues include HTN, dyslipidemia and generalized anxiety disorder. The affected areas are occasionally itchy and will ache when particularly severe. He has used OTC hydrocortisone cream and skin moisturizers without seeing improvement. Physical exam reveals inflamed patches on the scalp, accompanied by greasy yellow scales. Similar lesions are noted in the nasolabial folds and behind the ears and into the ear canals. Which of the following is the most likely diagnosis?

A. Dandruff
B. Seborrheic dermatitis
C. Psoriasis
D. Atopic dermatitis

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