Table 6:
Cannady’s et al. staging system about prognosis (as operationally defined by RR) for IP managed by advanced endoscopic techniques.
Group
Location and spread
Recurrence rate
Group A
IP confined to the nasal cavity, ethmoid sinus,
and medial maxillary sinus
3.0%
Group B
IP with lateral maxillary sinus, sphenoid sinus,
or frontal sinus involvement
19.8%
Group C
IP with extrasinus extension
35.3%