Infectious diseases are important causes of granulomatous diseases of the nasal cavity and paranasal sinuses. The most frequent bacterial agents responsible for granulomatous infections are Mycobacterium species (spp.) and Actinomyces spp. In the case of fungal pathogens, Aspergillus spp. are the most frequent. Mucor spp., Cryptococcus spp. and Histoplasma spp. are the other fungal microorganisms causing granulomatous reactions. In this case report, a patient suffering from a chronic nasal cavity lesion for 4 years with a recently developed premaxillary skin lesion is presented. Despite many biopsies having been performed and pathological studies conducted, a definitive diagnosis and an effective treat-ment could not be achieved. Finally, Aspergillus growth was observed in the fungal growth media when the material of the last skin biopsy was sent to microbiology as well as pathology. The patient was diagnosed as "chronic nasal fungal infection" and voricanozole treatment was initiated. Nine months after therapy, symptoms were almost totally resolved. In order to prevent similar difficulties of differential diagnosis, biopsy materials should be sent for aerobic, tuberculosis and fungal cultivation, as well as pathological examination, in order not to miss infectious diseases from the aetiology.