Cutaneous phaeohyphomycosis caused by Phialophora verrucosa

VernacularTitle:疣状瓶霉引起皮肤暗色丝孢霉病一例
Author: Suquan HU ; Xiaofang LI ; Guixia Lü ; Yongnian SHEN ; Hao CHEN ; Xiaoli ZHANG ; Weida LIU
Publication Type:Journal Article
Keywords: Phialophora; Chromoblastomycosis; Itraconazole
From: Chinese Journal of Dermatology 2011;44(8):564-566
CountryChina
Language:Chinese
Abstract: A 19-year-old man was admitted to the hospital for erythema and nodules on the face and postauricular region for 6 years. Microscopic examination of lesion scrapings revealed brown septate hyphae. A restricted, velvety and black colony grew on Sabouraud's dextrose agar. Slide culture on potato dextrose agar plate showed flask-shaped phialides at the apex of or around the hyphae with clear collarettes and flaring apex,mucilage-encapsuled, round to oval, semi-endogenous phialosporae accumulating at the apex of the phialides,giving a flower-like appearance. Anti-fungal susceptibility test showed that the fungus was sensitive to itraconazole, terbinafine and amphotericin B, but resistant to fluconazole. Sequence analysis of the ITS1-ITS4 region revealed a 98% consistency with the reference sequence of ITS1-ITS4 of Phialophora verrucosa. On the basis of above findings, the patient was diagnosed with cutaneous phaeohyphomycosis. Clinical improvement was seen after treatment with oral itraconazole (400 mg/d).