infectious diseases
Phaeohyphomycosis
Diagnosis of Phaeohyphomycosis
Examination using Masson-Fontana staining Culture to identify causative species Dematiaceous fungi can frequently be discerned in tissue specimens stained with conventional hematoxylin and eosin; they appear as septate, brownish hyphae or yeast-like cells, reflecting their high melanin content. Masson-Fontana staining for melanin confirms their presence. Phaeohyphomycosis is distinguished from chromoblastomycosis and mycetoma by the absence of specific histopathologic findings such as sclerotic bodies or grains in tissue. Culture is needed to identify the causative species. 