title: Polycyclic Annular Lesion Masquerading as Lupus Erythematosus and Emerging as Tinea Faciei Incognito.
abstract: Tinea incognito is a dermatophytic infection induced by immunosuppressive agents that lacks the classic features of a typical fungal infection. Although the treatment of tinea incognito is simple and relatively easy, its clinical manifestation varies and can masquerade as various skin disorders, causing misdiagnosis and thus preventing prompt and appropriate treatment. Here, we report an interesting case of tinea incognito occurring after topical steroid administration in an immunosuppressed patient with dermatitis artefacta. A 40-year-old female patient who had been taking systemic glucocorticoid for 4 years for chronic inflammatory demyelinating polyneuropathy presented with itching multiple erythematous erosive lesions on the face and upper chest for 2 months. Initial biopsy produced nonspecific findings. The skin lesion was aggravated and became polycyclic and erythematous; after azathioprine was added, her chronic inflammatory demyelinating polyneuropathy became aggravated. A second biopsy confirmed hyphae in the cornified layer. Complete remission was achieved after admonishing oral terbinafine and topical amorolfine.
authors.affiliation: Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Heesang
authors.initials: H
authors.lastname: Kye
authors.affiliation: Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Dai Hyun
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Soo Hong
authors.initials: SH
authors.lastname: Seo
authors.affiliation: Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Hyo Hyun
authors.initials: HH
authors.lastname: Ahn
authors.affiliation: Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Young Chul
authors.initials: YC
authors.lastname: Kye
authors.affiliation: Department of Dermatology, Korea University College of Medicine, Seoul, Korea.
authors.forename: Jae Eun
authors.initials: JE
authors.lastname: Choi
keywords: Immunosuppressive agents; Tinea faciei; Tinea incognito