腭部小涎腺多形性腺瘤的影像学分析

Imaging analysis of pleomorphic adenomas of the minor salivary glands of the palate

目的 探讨腭部小涎腺多形性腺瘤的影像学特征 ,提高诊断准确性。方法 回顾性分析 6例经手术病理证实的腭部小涎腺多形性腺瘤的CT、MRI表现。其中男 2例 ,女 4例。年龄 19～5 4岁 ,平均 36 3岁。结果 6例中 ,5例位于一侧硬腭 ,1例位于软腭 ;平均最大径 2 3cm ;4例为类圆形 ,2例呈分叶状 ,边界均清楚。肿瘤多呈软组织密度或稍长T1、稍长T2 信号 ,少数病变中心可出现更低密度或明显长T1、长T2 信号的囊变区。MR增强检查可呈轻至中度均一强化。结论 腭部小涎腺多形性腺瘤是腭部最常见的良性肿瘤 ,结合病史及典型CT。

Objective To study the imaging features of the pleomorphic adenomas of the minor salivary glands in the palate and to improve its diagnostic validity. Methods CT and MRI manifestations of 6 patients with palatal pleomorphic adenomas confirmed pathologically were analyzed retrospectively. There were 2 males and 4 females, and their age ranged from 19 to 54 years, with the mean age of 36.3 years. Results Among 6 cases, 5 tumors located in hard palate, and 1 in soft palate. 4 lesions were round like, and 2 were lobulated. Most tumors showed soft tissue density on CT, slightly long T 1 and slightly long T 2 signal intensity on MRI. Cystic degeneration could occur in the central part in some lesions, which appeared as much lower density or obviously long T 1 and long T 2 signal intensity. On post contrast MR scans, the lesions usually showed slightly homogeneous enhancement. Conclusions Pleomorphic adenomas of the minor salivary glands were the most common benign tumors in the palate. Combined with the clinical history, typical CT and MRI appearances, a definitive diagnosis can be made.