Review Article
Risk Factors of Recurrence and Malignant Transformation of Sinonasal Inverted Papilloma
Table 1
The Cannady classification [
11].
| ā | Localization | Recurrence rate |
| A | Nasal cavity, ethmoid sinus, medial wall of the maxillary sinus | 3.0% | B | Other (than medial) walls of maxillary sinus, sphenoid sinus, frontal sinus | 19.8% | C | Extrasinus extension | 35.3% |
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