Primary chromohifomycosis of the nasal septum.

Chromohyphomycosis, also known as chromoblastomycosis, is a disease that affects body areas unprotected by clothing; the lower limbs are the most affected.1 The nasal cavity is rarely affected by chromoblastomycotic lesions, and there have been only three cases described in this region.1-3 This infection is caused by a variety of fungi, which display a dark green color on the surface of culture medium due to the hyphal layer, and are almost black in depth. These fungi are called Dematiaceous and have a brownish color in the histological analysis, when stained with hematoxylin-eosin (HE).4 Septal chromohyphomycosis is rare, and its diagnosis is based on histopathological analysis and culture.5