目的讨论鳃裂囊肿的CT、MRI影 像学表现及其分布特点，以提高临床鳃裂 囊肿的诊断率。方法 回顾性分析25例经 手术、病理证实的鳃裂囊肿的CT和/或MRI 影像征象，并了解CT、MRI平扫检查对鳃 裂囊肿的显示能力。结果 25例鳃裂囊肿 案例中，3例为第一鳃裂囊肿，21例为第 二鳃裂囊肿，无第三鳃裂囊肿，1例为第 四鳃裂囊肿；囊肿主要分布于颌下及颈肌 间隙，呈圆形或椭圆形囊性结构，囊内密 度/信号均匀。结论 CT、MRI平扫图像可 以清晰的显示鳃裂囊肿的形态、结构，可 以满足临床诊断需求。

Objective To investigate the imaging manifestations of CT and MRI images of the branchial cleft cysts and Distribution characteristics, in order to improve the Diagnostic positive rate of branchial cleft cyst. Methods The CT signs and/or MRI images of the 25 cases branchial cleft cyst confirmed by operation and pathology were retrospectively analysis. And understand the display ability of CT and/or MRI scan images about branchial cleft cyst. Results Of the 25 cases of the branchial cleft cyst, 3 cases are the first branchial cleft cyst,21 cases are the second branchial cleft cyst, one case is the third branchial cleft cyst, 1 case is the fourth first branchial cleft cyst. The mainly distributed of the cyst is in the gap of the neck muscles and under the jaw area, performance for omogeneous signal of round and oval nidus. Conclusion CT and MRI scan images can clear the morphology and structure of the branchial cleft cysts, and can meet the demand of clinical diagnosis.