title: Diagnostic approach to a rare case of osteoid osteoma of the astragalus.
abstract: A rare case of osteoid osteoma of the ankle of the left foot is discussed. Standard X-ray and MRI were negative. Triphasic bone scintigraphy followed by CT were performed. Combined clinical CT and scintigraphy findings were highly suggestive of osteoid osteoma. This diagnosis was confirmed on histology.
authors.affiliation: Istituto di Radiologia, Università Cattolica del S. Cuore, Policlinico A. Gemelli, Roma.
authors.forename: Marinella
authors.initials: M
authors.lastname: Nanni
authors.forename: Ornella
authors.initials: O
authors.lastname: Pantalone
authors.forename: Alessandro
authors.initials: A
authors.lastname: Zappalà
authors.forename: Luana
authors.initials: L
authors.lastname: Ficociello
authors.forename: Paolo
authors.initials: P
authors.lastname: Campioni
authors.forename: Carlo
authors.initials: C
authors.lastname: Focacci
authors.forename: Pasquale
authors.initials: P
authors.lastname: Marano
mesh_terms: D001859:Bone Neoplasms / Q000175:diagnosis*; D003952:Diagnostic Imaging / Q000379:methods; D005260:Female; D006801:Humans; D008875:Middle Aged; D010017:Osteoma, Osteoid / Q000175:diagnosis*; D011859:Radiography; D011877:Radionuclide Imaging; D013639:Tarsal Bones / Q000000981:diagnostic imaging*