A 4-month-old infant presents with thick, greasy, yellowish, adherent scales on the scalp without significant pruritus. The rash also involves the axillae and the diaper area. There is no family history of atopy. What is the most likely diagnosis?
- A Infantile seborrheic dermatitis ✓
- B Atopic dermatitis
- C Irritant contact dermatitis
- D Infantile psoriasis
Correct answer: A. Infantile seborrheic dermatitis
Explanation
Infantile seborrheic dermatitis classically presents as non-pruritic, greasy, yellowish scales on the scalp (cradle cap) and intertriginous areas, including the diaper region. It lacks the intense pruritus and typical facial/extensor distribution of infantile atopic dermatitis. It typically resolves spontaneously within the first year, distinguishing it from psoriasis, which is more persistent and sharply demarcated.
Reference: Rook's Textbook of Dermatology, 9th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.