Chronic atrophic rhinitis with fetor (ozena): a histopathologic tretise.

Biopsy material from 50 patients with a known clinical diagnosis of ozena was examined histopathologically. Certain features were invariably seen, including mucosal atrophy, squamous metaplasia, and chronic inflammatory cell infiltrate which suggests a humoral mediated immune process. Histopathologic features allow ozena to be distinguished from chronic non-specific hypertrophic rhinitis, which may have a cell-mediated immune basis underlying its pathogenesis.

Crystallographic study of rhinoliths.

Five nasal stones were extracted from five patients. The etiology and clinical picture have been discussed. The stones were analysed by a crystallographic method, using an X-ray diffraction technique. Their composition was identified as calcium phosphate.