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Simple bone cyst: a radiological dilemma

¹Department of Radiology, Helsinki University Central Hospital, Helsinki, Finland; ²Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, Helsinki, Finland; ³Pathology Department, Haartman Institute, University of Helsinti, Helsinki, Finland

*Correspondence to: Department of Radiology, Helsinki University Central Hospital, PO Box 263 (Kasarmikatu 11-13), FI-00029 HUS, Finland; E-mail: anni.suomalainen{at}hus.fi

Received 20 March 2008; revised 24 April 2008; accepted 29 April 2008

An asymptomatic cystic lesion in the corpus region on the right side of the mandible was detected in a panoramic radiograph of a 13-year-old girl, taken for orthodontic reasons. MR examination revealed a cavity filled with fluid and thin-rim peripheral contrast enhancement of the lesion similar to an odontogenic cyst lined with epithelium. The clinical and histological diagnosis of the lesion was a simple bone cyst. This report demonstrates the confounding similarity of the MR findings of a simple bone cyst to an odontogenic cyst.

Keywords: bone cysts; radiography, panoramic; magnetic resonance imaging