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MR images mimic disc after discectomy

¹ Department of Oral Radiology, Faculty of Odontology, MalmöUniversity, Malmö, Sweden; ² Department of Oral and Maxillofacial Surgery, Faculty of Odontology, Malmö University and Malmö University Hospital, Malmö, Sweden; ³ Department of Radiology, Division of Diagnostic and Interventional Neuroradiology, University of Rochester Medical Center, Rochester, NY, USA

*Correspondence to: Arne Petersson, Malmö University, Faculty of Odontology, SE-205 06 Malmö, Sweden; E-mail: arne.petersson{at}od.mah.se

Received 29 September 2004; accepted 18 March 2005

MRI of a 30-year-old woman 1 year after discectomy showed a residual disc-like tissue. The observation was initially confusing, but a close comparison of pre- and post-operative images suggested that the inferior wall of the anterior joint capsule had migrated superiorly after the removal of the disc and mimicked a residual disc on the follow-up MR images.

Keywords: magnetic resonance imaging; discectomy; temporomandibular joint