A. Infectious

1. Histoplasmosis
2. Tuberculosis
3. Leprosy
4. Tertiary syphilis
5. Rhinosporidiosis
6. Rhinoscleroma
7. Paracoccidiodomycosis
8. Mucosal leishmaniasis

B. Neopastic

1. Basal Cell and Squamous Cell Carcinomas
2. Lymphoma

C. Other

1. Relapsing Polychondritis
2. Sarcoidosis
3. Wegener's Granulomatosis
4. Cocaine Abuse
5. Chronic or heavy nasal discharge with skin excoriation

References

1. Weller PF, Durand ML, Pilch BZ. 2005. NEJM. 352(6):609 (Case Record)