Back issues No.2 - 1987 / Original Study  

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Pityrosporum Folliculitis --- Clinicopathological observation of thirteen cases
Yu-Cheer Lee, Miaw-Shyun Changlai, Shih-yueh Chen, Yue-Zon Kuan
Dermatol Sinica 5: 75-83, 1987

Thirteen patients with Pityrosporum folliculitis are described. The typical lesions are monomorphous erythematous follicular papules and pustules localized to the upper back and forechest. The lesions occurred mostly in young adult and middle-aged, with male predominant, and some associated with long-term tetracycline therapy or systemic coricosteroid treatment. The diagnosis is hased on clinical pictures, finding of budding yeast cells in the inflamed follicles, and good response to oral ketoconazole treatment. The clinicohistopathologic correlation between the occurrence of folliculitis and the presence of the Pityrosporum organisms is demonstrated. The good response to ketoconazole therapy also indicates that the Pityrosporum orbiculare is the etiological agent. The related literatures has been reviewed and the possible pathogenesis is discussed.

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