[The differential diagnosis of aneurysmal bones cysts and non-ossifying fibromas (author's transl)].

With the help of intraosseous angiography, and bearing in mind the plain films and histopathological basis of the lesions, it is now possible to differentiate with certainty between a non-ossifying fibroma and an aneurysmal bone cyst. Since 20% of aneurysmal bone cysts recur after curretage or excision and most non-ossifying fibromas disappear spontaneously, intraosseous angiography has a valuable place in diagnosis.