Sumi Y, Miyaishi O, Ito K, Ueda M
Division of Dental Surgery, The National Chubu Hospital, Obu-City, Japan.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2000 Nov;90(5):671-6. doi: 10.1067/moe.2000.108917.
The findings of conventional radiography, computed tomography, and magnetic resonance imaging (MRI) are reported for an odontogenic myxoma arising in the mandible of a 48-year-old Japanese man. The MRI characteristics of an intraosseous myxoma are described for only the third time. MRI showed a well-defined and smooth-walled mass lesion with high-signal intensity on T2-weighted images and low-intermediate-signal intensity on TI-weighted images. Soft tissue myxomas have been reported to show low-signal intensity on TI-weighted images and high-signal intensity on T2-weighted images. However, the first MRI report of an intraosseous myxoma showed a higher-signal intensity on TI-weighted images and lower-signal intensity on T2-weighted images. The MRI findings in this study thus correspond to those of soft tissue myxomas and do not agree with observations of the first MRI report of the intraosseous myxoma. Further studies are needed to clarify the reasons for this difference.
报告了一名48岁日本男性下颌骨发生的牙源性黏液瘤的传统X线摄影、计算机断层扫描和磁共振成像（MRI）结果。骨内黏液瘤的MRI特征仅第三次被描述。MRI显示一个边界清晰、壁光滑的肿块病变，在T2加权图像上呈高信号强度，在T1加权图像上呈低-中等信号强度。据报道，软组织黏液瘤在T1加权图像上呈低信号强度，在T2加权图像上呈高信号强度。然而，第一篇关于骨内黏液瘤的MRI报告显示在T1加权图像上信号强度较高，在T2加权图像上信号强度较低。本研究中的MRI结果因此与软组织黏液瘤的结果相符，与第一篇关于骨内黏液瘤的MRI报告的观察结果不一致。需要进一步研究以阐明这种差异的原因。
