“…Fungal sinusitis is classically divided into non-invasive (fungal ball, allergic fungal sinusitis, saprophytic fungal growth) and invasive forms (acute invasive fungal sinusitis, chronic IFS, chronic granulomatous fungal sinusitis) ( Table 1 ). 1 , 2 , 3 , 4 , 5 , 6 Invasive fungal sinusitis (IFS) is a life-threatening entity involving fungal species such as Mucor and Aspergillus that, in the immunosuppressed host, become invasive, and extend beyond the bony boundaries of the sinuses and skull base. 1 , 2 , 6 The morbidity and mortality associated with IFS are high, especially for acute IFS.…”