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Simple bone cyst: a discrepancy between magnetic resonance imaging and surgical observations
L Eriksson1, L G Hansson, L Akesson
1Department of Oral and Maxillofacial Surgery, School of Dentistry and Rigshospitalet, University of Copenhagen, Denmark. lars.o.eriksson@skaue.se
Objective:
The purpose of this study was to compare magnetic resonance (MR) imaging and surgical observations of fluid in simple bone cysts.
Study Design:
Findings during MR imaging of 7 simple bone cysts were compared with surgical observations 1 day or 1.8 months (mean) after MR imaging.
Results:
All MR images showed cavities filled with fluid. In 2 patients operated on the day after the imaging, surgical observations were in accordance with the MR findings. At surgery 1.8 months after the MR examination, 4 cavities were found to be empty and 1 cavity contained only a minor amount of fluid.
Conclusion:
A discrepancy between MR imaging and surgical observations of fluid in simple bone cyst cavities was observed that might be dependent on the time between the observations, indicating that a fairly rapid absorption of fluid might occur or that the amount of fluid in a simple bone cyst can vary for unknown reasons.