Snapshot A 19-year-old African American woman presents to her dermatologist for evaluation of white patches on her skin. She reports white patches developing on her hands, face, and chest in the past few months. She has been covering them up with makeup powder but admits to feeling depressed because of the lesions. Her past medical history includes autoimmune thyroid disease. Physical exam reveals multiple sharply demarcated macules and patches of depigmentation. She is started on phototherapy. Introduction Clinical definition login to view 1 more bullet Epidemiology login to view 4 more bullets Pathogenesis login to view 5 more bullets Associated conditions login to view 3 more bullets Prognosis login to view 1 more bullet Presentation Symptoms login to view 1 more bullet Physical exam login to view 4 more bullets Studies Biopsy login to view 2 more bullets Histology login to view 2 more bullets Differential Tinea versicolor Pityriasis alba Treatment Conservative login to view 10 more bullets Medical login to view 16 more bullets Complications Poor quality of life and psychologic burden