If the diagnosis is still in doubt, skin scrapings may be sent for fungal culture, keeping in mind that Malassezia will only grow on a lipid-containing medium, such as Leeming and Notman agar.

Nikki A. Levin, MD, PhD, is an Assistant Professor of Medicine, Division of Dermatology, University of Massachusetts Medical School, Worcester, MA. Note: The author reported no actual or potential ...