Araki K, Ariji E, Shimizu M, Kanda S, Ozeki S, Shinohara M, Ariji Y
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kyushu University, Japan.
Dentomaxillofac Radiol. 1997 May;26(3):177-82. doi: 10.1038/sj.dmfr.4600235.
To clarify the diagnostic utility of CT in the evaluation of carcinoma of the maxillary gingiva and hard palate.
The CT scans of 27 patients with squamous cell carcinoma of the upper gingiva and hard palate were reviewed. Tumor extent and bone destruction were compared with the surgical and histopathological findings to estimate the sensitivity, specificity and accuracy of CT.
The primary tumor was detected by CT in 89% of patients. The grade of bone destruction determined by CT correlated well with that verified at surgery or by histopathological examination. The sensitivity, specificity, and accuracy of CT for invasion to the buccal mucosa were 64%, 89% and 75% respectively. For maxillary sinus invasion, CT showed low specificity but high sensitivity. The accuracy was 86% when the criterion for sinus invasion was the presence of an enhanced mass continuous with the primary tumor.
CT is helpful for the evaluation of tumor extent in the upper gingiva and hard palate carcinoma. However, invasion of the maxillary sinus should be considered carefully, because CT findings suggestive of destruction of the floor of the maxillary sinus are not always consistent with sinus invasion.
阐明CT在上颌牙龈和硬腭癌评估中的诊断效用。
回顾了27例上颌牙龈和硬腭鳞状细胞癌患者的CT扫描图像。将肿瘤范围和骨质破坏情况与手术及组织病理学检查结果进行比较，以评估CT的敏感性、特异性和准确性。
CT检测到89%患者的原发性肿瘤。CT确定的骨质破坏程度与手术或组织病理学检查证实的情况高度相关。CT对颊黏膜侵犯的敏感性、特异性和准确性分别为64%、89%和75%。对于上颌窦侵犯，CT特异性较低但敏感性较高。当以上颌窦侵犯标准为存在与原发性肿瘤相连的强化肿块时，准确性为86%。
CT有助于评估上颌牙龈和硬腭癌的肿瘤范围。然而，应谨慎考虑上颌窦侵犯情况，因为提示上颌窦底破坏的CT表现并不总是与窦腔侵犯相符。
