26例成釉细胞瘤的影像学特征及计算机断层扫描和磁共振成像的诊断价值

Imaging characteristics of ameloblastomas and diagnostic value of computed tomography and magnetic resonance imaging in a series of 26 patients.

作者信息

Apajalahti Satu, Kelppe Jetta, Kontio Risto, Hagström Jaana

机构信息

HUS Medical Imaging Center, Department of Radiology, Helsinki University Central Hospital, Helsinki, Finland.

Department of Oral Pathology, University of Helsinki, Helsinki, Finland.

出版信息

Oral Surg Oral Med Oral Pathol Oral Radiol. 2015 Aug;120(2):e118-30. doi: 10.1016/j.oooo.2015.05.002. Epub 2015 May 13.

DOI:10.1016/j.oooo.2015.05.002

PMID:26166034

Abstract

OBJECTIVES

To evaluate the imaging characteristics of ameloblastomas and to analyze the diagnostic value of computed tomography (CT) and magnetic resonance imaging (MRI) compared with conventional dentoalveolar imaging.

STUDY DESIGN

In this observational retrospective study, the panoramic radiographs (n = 25) and the CT (n = 26) and MRI (n = 5) images of histopathologically verified ameloblastomas in 26 patients were reviewed.

RESULTS

Characteristic findings were multilocularity, marked expansion of the cortical plate, perforation at an earlier stage, and extensive root resorption. On contrast-enhanced CT or MRI, the majority (14 of 17) of the nonunicystic ameloblastomas contained a mixed cystic and solid pattern. Unicystic ameloblastomas (n = 6) and ameloblastomas derived from the cyst epithelium (n = 2) showed thick rim enhancement or a mural solid component in an otherwise cystic lesion.

CONCLUSIONS

Contrast-enhanced CT and MRI greatly aid in distinguishing between ameloblastomas and other cystlike lesions because they allow for visualization of the mixed cystic and solid content characteristic of nonunicystic ameloblastomas. The differential diagnostic value of CT and MRI is significant with regard to unicystic ameloblastomas.

摘要