Simple bone cyst: a discrepancy between magnetic resonance imaging and surgical observations.
OBJECTIVE
The purpose of this study was to compare magnetic resonance (MR) imaging and surgical observations of fluid in simple bone cysts.


METHODS
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.


CONCLUSIONS
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.
Eriksson
L
L
Department of Oral and Maxillofacial Surgery, School of Dentistry and Rigshospitalet, University of Copenhagen, Denmark. lars.o.eriksson@skaue.se
Hansson
L G
LG
Akesson
L
L
Ståhlberg
F
F
D000293:Adolescent; D020420:Cyst Fluid; D005260:Female; D006801:Humans; D007570:Jaw Cysts / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008336:Mandibular Diseases / Q000473:pathology* / Q000601:surgery; D013997:Time Factors