The minimally invasive sinus technique: theory and practice.

Minimally invasive sinus technique (MIST) is a targeted endoscopic intervention, introduced in 1994, with goals virtually identical to those originally reported for FESS but with distinct differences. The procedure, as outlined in the following section, is the only stepwise intranasal intervention with a defined beginning and end for all patients regardless of disease severity, thereby standardizing the procedure for surgeons and patients alike. This elegant, reproducible method avoids unnecessary disruption of normal mucosa while restoring mucociliary clearance through the primary birth ostia and reduces operative morbidity.