MRI及动态对比增强MRI在颌骨单纯性骨囊肿与真性囊肿鉴别诊断中的应用价值

Usefulness of MRI and dynamic contrast-enhanced MRI for differential diagnosis of simple bone cysts from true cysts in the jaw.

作者信息

Yanagi Yoshinobu, Asaumi Jun-ichi, Unetsubo Teruhisa, Ashida Masakazu, Takenobu Toshihiko, Hisatomi Miki, Matsuzaki Hidenobu, Konouchi Hironobu, Katase Naoki, Nagatsuka Hitoshi

机构信息

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.

出版信息

Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Sep;110(3):364-9. doi: 10.1016/j.tripleo.2010.05.001.

DOI:10.1016/j.tripleo.2010.05.001

PMID:20727497

Abstract

INTRODUCTION

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.

MATERIALS AND 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.

CONCLUSION

MRI, especially DCE-MRI, can provide useful information for distinguishing SBCs from other cysts.

摘要

引言

当颌骨内的单纯性骨囊肿（SBCs）表现为单房性病变时，很难将其与真性囊肿区分开来。本研究报告了SBCs患者的磁共振成像（MRI）情况，并描述了MRI表现的诊断价值。

材料与方法

对10例颌骨SBCs患者进行了MRI检查。获取了T1加权像（T1WI）和T2加权像（T2WI），并进行了增强扫描和动态对比增强MRI（DCE-MRI）检查。

结果

所有病例中，静脉注射钆喷酸葡胺（Gd-DTPA）后约6分钟获得的增强T1WI显示囊肿边缘明显强化，囊肿腔内部分轻度强化。所有病例中，时间-信号强度（SI）曲线显示，在静脉注射Gd-DTPA后约15分钟内SI逐渐升高。这些表现可能不会出现在其他具有上皮衬里的真性囊肿的DCE-MRI上，后者囊肿腔内无强化。