Pityriasis rotunda in a child

Abstract

Pityriasis rotunda is an uncommon disorder of keratinization characterized by sharply defined hyper- or hypo-pigmented, perfectly circular, scaly patches with no inflammatory changes. The etiology of pityriasis rotunda remains unknown. Most authors believe that it is a form of acquired ichthyosis and it has been associated with a variety of conditions including tuberculosis, malnutrition, and malignancy. We report a case of pityriasis rotunda in a 7-year-old otherwise healthy female who was treated with topical retinoids and emollients with partial improvement.

Keywords

• Disorder of keratinization
• ichthyosis
• pityriasis rotunda
• scaling