Onychomycosis with gray-green staining caused by Fusarium solani

We report a case of onychomycosis due to Fusarium solani with gray-green staining, which improved after nail plate removal and antifungal liquid of effinaconazole. Fungal cultures revealed light-brown and dark-green colonies. Gray-green nail might have occurred due to the combination of these colonies, which necessitated differentiation from green nail. Fusarium solani was detected on the genetic analysis of the colonies. Fusarium species reportedly produce yellow or red pigments; however, Fusarium species has not been previously reported to produce green pigments or forming dark-green colonies in fungal cultures.