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目的 探讨腭部多形性腺瘤(PA)的CT表现特点.方法 回顾性分析23例经病理证实的腭部多形性腺瘤的CT表现并复习相关文献.所有病例均行CT平扫,其中11例行增强扫描.重点对病灶的部位、数目、形态、边缘、密度及强化特征等进行观察分析.结果 23例病变中发生于硬腭9例,软硬腭交界处8例,软腭6例.16例呈类圆形,7例呈椭圆形肿块,界限清楚,平扫时肿块密度等于或稍低于邻近肌肉,14例密度均匀,9例密度不均匀,病灶内可见斑片状或裂隙样低密度区,4例可见钙化或骨化,12例伴有邻近骨质受压吸收,14例病灶周围见环状低密度影.增强后实性部分为轻至中等强化,9例呈不均匀强化,瘤内可见斑片状或裂隙状不强化区,病灶周围环状低密度影不强化,2例强化均匀.结论 腭部多形性腺瘤的CT表现具有一定特点,能为术前诊断和治疗提供帮助.“,”Objective To discuss CT characteristics of pleomorphic adenoma of the palate.Methods CT findings of 23 patients with pathologically-confirmed pleomorphic adenoma were retrospectively analyzed,and the relevant literatures were reviewed.Plain CT scanning was performed in all patients,and in 11 patients additional contrast-enhanced scanning was carried out.CT manifestations,focusing on the location,number,shape,margin,density,and enhancement pattern of the lesions,were analyzed.Results Of the 23 patients,the lesion was located at the hard palate in 9,at the junction of hard and soft palate in 8,and at the soft palate in 6.The lesion was round in 16 patients,and presented as an oval mass in 7 patients.All the lesions had a well-defined margin.On plain CT scans,the lesions were intermediate density that was equal to or slightly lower than the muscle density.Fourteen lesions showed homogeneous density,while nine lesions were inhomogeneous in density with intratumoral patchy or crack-like low density areas,calcifications or ossifications.Compression bone absorption of the hard palate was observed in 12 cases.Annular low-density shadow around the lesion was demonstrated in 14 cases.On contrast-enhancedimaging,the solid part of the tumor showed mild to moderate enhancement,and heterogeneous enhancement was noted in 9 cases.Intratumoral patchy or crack-like low density area and peritumoral annular low density showed no enhancement.In 2 cases the tumor displayed homogenous enhancement.Conclusion Pleomorphic adenoma of the palate carries certain CT characteristics,which is very helpful in making preoperative diagnosis and in guiding clinical treatment.