颌下腺混合瘤的CT表现

目的：总结分析颌下腺混合瘤的CT表现。方法：回顾性分析13例经手术病理证实的颌下腺混合瘤的CT表现,所有病例均行轴面平扫和增强扫描,并与病理结果进行对比分析。结果：所有病例均为单侧单发病灶。平扫7例密度低于正常腺体,4例呈等密度,2例密度不均匀,病灶与正常腺体分界不清,13例患侧腺体均增大,肿瘤均未突出腺体包膜,与周围组织的脂肪间隙仍存在;增强扫描病灶强化程度均低于正常腺体,表现为轻至中度强化,3例病灶内出现大小不等圆形低密度影。病灶直径1.4-3.2 cm。结论：颌下腺混合瘤CT表现具有良性肿瘤的特点,结合临床病史,CT可做出正确诊断。

CT features of submandibular gland pleomorphic adenoma

Objective：To study the CT features of submandibular pleomorphic adenoma.Methods：CT features of 13 cases with surgery and pathology proven submandibular gland pleomorphic adenoma were retrospectively analyzed.All cases underwent plain and contrast-enhanced axial CT scanning and correlated with pathology.Results：All cases had unilateral solitary lesion.7 lesions showed low attenuation compared with that of normal glandular tissue,4 lesions were iso-attenuated and 2 lesions were heterogeneous in density on plain CT.No clear border was existed between lesion and normal glandular tissue.The volume of all involved submandibular gland were enlarged yet without protrusion of glandular capsule.Peri-tumoral fatty space was still existed.On contrast enhanced CT,the attenuation of all lesions were lower than the normal glandular tissue,mild-moderate enhancement were showed,round hypo-attenuated density with various size could be assessed within the lesion.The sizes of tumor ranged from 1.4~3.2cm.Conclusion：Characteristic CT features of submandibular gland pleomorphic adenomas could be revealed as benign tumor and correct CT diagnosis could be obtained when correlated with clinical symptoms.