[Fusarium onychomycosis].

INTRODUCTION: A 69-year-old man with an uneventful past history consulted for a proximal subungueal leukonychia and associated paronychia of the right greater toe. Macroscopic examination and culture lead to the diagnosis of Fusarium oxysporum. Local treatment with bifonazol and cyclopirox was effective. DISCUSSION: Fungal onychomycoses are uncommon and usually present as superficial leukonychia. The association of a proximal localization with paronychia would suggest possible Fusarium infection. Though no specific treatment protocol is well-established, this case emphasizes the importance of effective treatment since invasive fusariosis is described in immunosuppressed patients with ungueal localizations can be an important portal for infection.