Case report 792. Eosinophilic granuloma of bone.

Eosinophilic granuloma is commonly thought of as a disease of children which can occur in either the axial or the appendicular skeleton. Only approximately 10% of cases occur in patients over the age of 40 years, and only approximately 12% of lesions occur in the pelvis, with no previously illustrated cases of this combination of age and location. These facts along with the nonspecific radiographic appearance made biopsy necessary for the correct diagnosis in the patient described.