A case of chromoblastomycosis: with special reference to the mycology of the isolated Exophiala jeanselmei.

Summary: A 23‐year‐old male patient with a plaque‐like lesion of chromoblastomycosis on the left buttock is described. Sclerotic cells were demonstrated in the scales and tissue sections. Both granular and mould‐like colonies were isolated from the same material of the lesion. Moreover, a part of the granular colony was transformed into the mould‐like colony which showed the same morphology and other characteristics as those of the originally isolated mould‐like colony. The mould‐like colony was identified as E. jeanselmei on the basis of morphology, physiology, thermotolerance and serologic test The granular colony was identified as the granular form of E. jeanselmei because of its transformation into the mould‐like colony which should be considered as the mycelial form of E. jeanselmei from now on. It was of interest to note that E. jeanselmei can be a causative organism of chromoblastomycosis and has a granular form.