Diagnostic problems of periodontitis-like lesions caused by eosinophilic granuloma.

Eosinophilic granuloma is the localized and mildest form of histiocytosis X. It is a destructive osseous lesion characterized by large numbers of eosinophils and histiocytes. The etiology of the disease is unknown. Frequently the jaws, including the periodontium, are involved and the disease stimulates severe localized periodontitis. A case of eosinophilic granuloma of the jawbone is presented. The pertinent clinical features are emphasized and possible problems in the interpretation of clinical periodontal features are discussed.