原发性气管腺样囊性癌的影像诊断

目的 提高气管腺样囊性癌(Acc)的诊断水平。方法 对20例经病理证实的气管腺样囊性癌的临床与影像表现进行回顾性分析。结果 Acc好发于气管后侧壁，年龄偏低，生长缓慢，少见淋巴转移。于管壁及腔内外呈结节状或弥漫浸润性生长。气管体层、cT、螺旋CT重建及MRI均可显示。结论 与其他气管肿瘤一样较易延误诊断，但只要提高警惕，加强对本病的认识，紧密结合临床，多数患者是能作出诊断的。

Imaging diagnosis of primary tracheal adenoid cystic carcinoma

Objective To improve the imaging diagnosis of the primary tracheal adenoid cystic carcinoma (ACC). Methods Clinical manifestations and imaging findings were retrospectively studied in 20 cases of ACC proved by histological examinations. Results ACC is often found in the posterior wall of trachea in younger patients. ACC grew slowly and lymphatic metastasis was rare. The nodular, diffuse or infiltrative growth of ACC was revealed on tomography, CT, MPR with spiral CT scan and MRI. Conclusion Like other tracheal tumor, ACC can easily be miss-diagnosed. With further understanding of imaging findings and a clinical concern, the early diagnosis can be obtained in most patients with ACC.