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[Chromoblastomycosis caused by Fonsecaea monophora].

Fonsecaea species are major etiologic agents of Chromoblastomycosis (CBM). By genetic analysis, the genus Fonsecaea has recently been revised and classified into F. pedorosoi, F. monophora and F. nubica. Here we report a severe chronic case of CBM caused by F. monophora. A 55-year-old Filipino male developed progressive skin lesions on the left lateral ankle in 1973, when he worked at a coconut plantation in the Philippines. In 1999, he received medical treatments for enlarged, multiple lesions on the left lower limb. When he moved to Japan in 2005, the lesions were remarkably improved and he discontinued taking the medicine. On our first examination in October 2008, a large, reddish, cicatricial plaque was observed on the left lower aspect of his leg. Several tumorous lesions surrounded the plaque, indicating that the therapies performed before had been insufficient. In addition, there were many patchy scars scattered on the thigh and the upper part of the lower leg. The diagnosis of CBM was made by the presence of muriform cells. Black, pulverulent colonies were yielded in culture of skin scrapings and tissues. Although the fungus could not be identified by microscopic morphology, r-RNA ITS sequence analysis enabled identification of Fonsecaea monophora. The patient responded well to oral voriconazole combined with local thermotherapy using pocket warmers. The tumoral masses subsided in 6 months, leaving pink scars with negative fungal culture. Voriconazole treatment was continued for 18 months. It seems that drugs are insufficiently delivered in the cicatricial lesions because of the paucity of blood flow, suggesting that a long-term follow-up is necessary for such a case.