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Need for applying high index of suspicion in daily practice: four cases of tinea incognito
( Cjung Woo Lee ),( Jae Woo Ahn ),( Jiehyun Jeon ),( Chil Hwan Oh ),( Hae Jun Song ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1
Tinea incognito is dermatophyte infection of the skin with an atypical appearance. In many cases, there are previous treatments-tend to be improper-with immunosuppressive agents such as steroids or calcineurin inhibitors. As the fungus-induced local inflammation is suppressed, it may show a modification of typical manifestations, presenting various morphologies. Patient 1 was a 66-year-old man presenting erythematous macules, papules with scanty scales on face and neck. He had applied topical steroids for previous 4 months. Patient 2, 37-year-old man visited for mild tender, itchy erythematous bullous oozing patches on left great toe area about a year ago. The lesion was thought to be kind of contact dermatitis with secondary infection. Despite of continuous treatment, the lesion kept worsening. Patient 3 was a 39-year-old woman with underlying psoriasis. Her psoriasis was generally stable but scaly erythematous patch on left post-auricle was the only lesion goes worsening. Patient 4, 23-year-old man with atopic dermatitis presented for uncontrolled itchy xerotic patches on whole body. All of above cases revealed positive findings on serial KOH test and were successfully treated by antifungal therapies. The entity of tinea incognito can mimic many other cutaneous disorders. Whenever patients complain about atypical skin lesions unresponsive to immunosuppressive agents, it is important Tinea incognito is dermatophyte infection of the skin with an atypical appearance. In many cases, there are previous treatments-tend to be improper-with immunosuppressive agents such as steroids or calcineurin inhibitors. As the fungus-induced local inflammation is suppressed, it may show a modification of typical manifestations, presenting various morphologies. Patient 1 was a 66-year-old man presenting erythematous macules, papules with scanty scales on face and neck. He had applied topical steroids for previous 4 months. Patient 2, 37-year-old man visited for mild tender, itchy erythematous bullous oozing patches on left great toe area about a year ago. The lesion was thought to be kind of contact dermatitis with secondary infection. Despite of continuous treatment, the lesion kept worsening. Patient 3 was a 39-year-old woman with underlying psoriasis. Her psoriasis was generally stable but scaly erythematous patch on left post-auricle was the only lesion goes worsening. Patient 4, 23-year-old man with atopic dermatitis presented for uncontrolled itchy xerotic patches on whole body. All of above cases revealed positive findings on serial KOH test and were successfully treated by antifungal therapies. The entity of tinea incognito can mimic many other cutaneous disorders. Whenever patients complain about atypical skin lesions unresponsive to immunosuppressive agents, it is important