title: The apple core sign.
authors.affiliation: Department of Radiology, Zentralkrankenhaus St.-Jürgen-Strasse, 28205 Bremen, Germany. Radiologie@zkh.de
authors.forename: J
authors.initials: J
authors.lastname: Freyschmidt
mesh_terms: D003937:Diagnosis, Differential; D005272:Femur Neck / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D011859:Radiography; D013585:Synovitis / Q000000981:diagnostic imaging* / Q000503:physiopathology