[Sinonasal and petrous bone fungal infections].

Sinonasal and petrous bone fungal infections are rare and life-threatening conditions that essentialy arise in immunocompromised patients. They are mainly due to Aspergillus in patients with hematological diseases and to Mucorales in diabetic. Invasive fungal sinusitis can be acute (invasive aspergillosis, rhino-orbito-cerebral mucormycosis) but chronic invasive sinusitis can also exist (invasive chronic fungal sinusitis and granulomatous invasive fungal sinusitis). Petrous bone fungal infections are similar to bacterial necrotizing otitis externa and are most often due to Aspergillus. The diagnosis must be made as early as possible with surgical biopsies, to allow early therapeutic management. Histopathological analysis is essential to confirm the diagnosis. The treatment is multidisciplinary and combines antifungal treatments with etiological care, sometimes associated with debridement surgery especially for mucormycosis.