title: Subtle radiographic findings of acute, isolated distal radioulnar joint dislocation.
abstract: Distal radioulnar dislocations typically occur in association with fractures of the distal radius and/or ulna. Rare isolated dislocations or subluxations are more difficult to diagnose and are initially missed in up to 50 % of cases. We present two cases of missed isolated volar rotatory dislocation of the distal radioulnar joint. Subtle, overlooked radiographic findings of abnormal radioulnar alignment and ulnar styloid projection are highlighted. The supplemental role of cross-sectional imaging is reviewed. Adequate clinical information, appropriate radiographic technique, and high index of suspicion are necessary for the accurate and timely diagnosis of this rare injury pattern.
authors.affiliation: Department of Radiology, H066, Milton S. Hershey Medical Center, 500 University Drive, P.O. Box 850, Hershey, PA, 17033, USA. dduryea@hmc.psu.edu.
authors.forename: Dennis M
authors.initials: DM
authors.lastname: Duryea
authors.affiliation: Bone and Joint Institute, Milton S. Hershey Medical Center, 30 Hope Drive, Hershey, PA, 17033, USA.
authors.forename: Alexander H
authors.initials: AH
authors.lastname: Payatakes
authors.affiliation: Bone and Joint Institute, Milton S. Hershey Medical Center, 30 Hope Drive, Hershey, PA, 17033, USA.
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Mosher
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014457:Ulna / Q000000981:diagnostic imaging; D014954:Wrist Injuries / Q000000981:diagnostic imaging*; D014955:Wrist Joint / Q000000981:diagnostic imaging
keywords: CT; Dislocation; Distal radioulnar joint; MRI; Radiograph; Ulnar styloid