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Classification of fungal rhinosinusitis (adapted from ref. 9).
| Category | Host immune status | Role of fungus |
|---|---|---|
| A. Invasive | ||
| 1. Granulomatous invasive | Immunocompetent | Pathogen |
| 2. Chronic invasive | Impaired (diabetes, steroids) | Pathogen |
| 3. Acute invasive | Immunocompromised | Pathogen |
| B. Non-invasive | ||
| 1. Localized colonization | Immunocompetent | Saprophyte |
| 2. Fungus ball | Immunocompetent | Saprophyte |
| 3. Allergic | Atopic | Allergen |
| 4. Eosinophilic | Mostly non-atopic | Uncertain |
