The yellowish greasy scales on the scalp of an infant are characteristic of seborrheic dermatitis

The yellowish greasy scales on the scalp of an infant are characteristic of seborrheic dermatitis.

Seborrheic dermatitis is a common, inflammatory skin condition that causes the formation of flaky, white to yellowish greasy scales on oily areas such as the scalp, forehead, nose, or inside the ear. It is known as cradle cap when it affects the scalp of infants

Tinea capitis is ringworm of the scalp. It is uncommon in infants. It is common in older children and presents as patches of alopecia associated with scaling or black dots (swollen hair shafts). Favus is also an inflammatory variant of tinea capitis characterized by yellowish, cup‐shaped crusts known as scutula that develop around hair follicles which is absent here

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