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Polyp grading system
| Grade | |
|---|---|
| 0 | No visible NPs; |
| 1 | Small amount of polypoid disease confined within the middle meatus; |
| 2 | Multiple polyps occupying the middle meatus: |
| 3 | Polyps extending beyond the middle meatus, within the sphenoethmoid recess but not totally obstructing, or both; |
| 4 | Polyps completely obstructing the nasal cavity; |
NP Nasal polyp
