| Differential diagnosis of nasal obstruction

| Table 1. Differential diagnosis of nasal obstruction |
 |
| Cause |
 |
Example |
| Allergic |
Allergic rhinitis |
| Congenital |
Encephalocele (iatrogenic or posttraumatic), glioma, teratoma |
| Chronic rhinosinusitis |
|
| Endocrine |
Pregnancy, hypothyroidism, adrenal insufficiency, menstruation |
| Iatrogenic |
Atrophic rhinitis, overresection, overnarrowing after osteotomies |
| Infection |
Acute and chronic rhinosinusitis, septal abscess |
| Inflammatory polyposis |
|
| Mechanical |
Deviated septum, nasal valve collapse, synechiae, nasal polyps, inferior turbinate hypertrophy, middle turbinate hypertrophy (including concha bullosa), adenoid hypertrophy, choanal atresia, septal hematoma |
| Medicinal |
Rhinitis medicamentosa |
| Neoplastic |
Benign and malignant nasal tumors |
| Foreign body |
|
| Nasal cycle |
|
| Other |
|
 |
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