Usefulness of MRI and dynamic contrast-enhanced MRI for differential diagnosis of simple bone cysts from true cysts in the jaw.
BACKGROUND
It can be difficult to differentiate simple bone cysts (SBCs) from true cysts in the jaw when these lesions appear unilocular. The present study reports the MR imaging of subjects with SBCs and describes the diagnostic value of the MRI findings.


METHODS
Ten subjects with SBCs in the jaw were examined using MRI. T1- and T2-weighted images (T1WI, T2WI) were obtained, and contrast-enhanced images and dynamic contrast-enhanced MRI (DCE-MRI) were acquired.


RESULTS
In all cases, the contrast-enhanced T1WI acquired approximately 6 minutes after the administration of Gd-DTPA showed marked enhancement of the margin and slight enhancement of the inner part of the cyst cavity. In all cases, the time-signal intensity (SI) curves show a gradual increase in the SI until approximately 15 minutes after the administration of Gd-DTPA. These findings might not be observed on the DCE-MRIs of the other true cysts with epithelial lining that show no enhancement in a cavity.


CONCLUSIONS
MRI, especially DCE-MRI, can provide useful information for distinguishing SBCs from other cysts.
Yanagi
Yoshinobu
Y
Department of Oral Diagnosis and Dentomaxillofacial Radiology, Okayama University Hospital, and Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Okayama University Graduate School of Medicine, Okayama, Japan.
Asaumi
Jun-ichi
J
Unetsubo
Teruhisa
T
Ashida
Masakazu
M
Takenobu
Toshihiko
T
Hisatomi
Miki
M
Matsuzaki
Hidenobu
H
Konouchi
Hironobu
H
Katase
Naoki
N
Nagatsuka
Hitoshi
H
D000293:Adolescent; D000328:Adult; D003287:Contrast Media; D003560:Cysts / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007570:Jaw Cysts / Q000000981:diagnostic imaging* / Q000473:pathology; D007571:Jaw Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D055815:Young Adult
D003287:Contrast Media