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Staging of nasal mucosa lesions.
| Stage | Clinical observations of nasal mucosa lesion |
|---|---|
| 0 | No apparent lesions |
| I | Nodulation without ulceration |
| II | Superficial ulceration |
| III | Deep ulceration |
| IV | Septal perforation |
| V | Destruction of nasal architecture and changes in facial structure |
Staging system proposed by Lessa,10 modified by Ito.
