Diagnostic dilemmas in pediatric/adolescent dermatology: scaly scalp.

Scaly scalp is a common problem in the pediatric and adolescent population. The possible causes range from the commonly seen tinea capitis and seborrheic dermatitis to rare systemic diseases such as dermatomyositis and Letterer-Siwe disease. In all cases a thorough history and physical examination are important first steps to successful diagnosis and treatment.