Snapshot A 21-year-old man presents to his dermatologist for a rash on his face. He reports that there is no itch or pain associated with it. Although he spent a summer at the beach as a lifeguard and the rest of his face tanned, the area with the rash has not tanned, resulting in a white and yellow colored patches on his face. On physical exam, there are multiple yellow-white macules along his jawline and a large patch on his left cheek. There are also multiple similar patches on his trunk. A skin scraping and KOH preparation reveals tinea versicolor as a diagnosis. He is prescribed a medicated shampoo to use on his skin. Introduction Clinical definition login to view 3 more bullets Associated conditions login to view 1 more bullet Epidemiology Prevalence login to view 2 more bullets Demographics login to view 1 more bullet Risk factors login to view 3 more bullets Etiology Malassezia spp. login to view 1 more bullet Pathogenesis login to view 1 more bullet Presentation Symptoms login to view 2 more bullets Physical exam login to view 8 more bullets Studies KOH preparation login to view 3 more bullets Wood lamp examination login to view 2 more bullets Differential Vitiligo login to view 2 more bullets Eczema Psoriasis Seborrheic dermatitis Treatment Medical login to view 17 more bullets Complications Areas of discoloration may be permanent Prognosis Often recurs