知识与财富的链接
目的 观察原发性肺腺样囊性癌(ACC)的CT表现.方法 回顾分析26例经病理证实的原发性ACC患者的CT表现.结果 26例患者中中央型ACC 24例, 周围型2例;颈段气管病变5例,胸段气管病变11例,段及段以上大支气管病变8例,段以下小支气管病变2例;19例肿物向腔内外生长,7例肿物局限于腔内生长;病灶边界清楚,平扫密度较低、均匀,增强后无明显强化.结论 ACC CT常表现为低密度的中央型肿物,增强无明显强化.CT可显示病灶向腔外生长、管壁浸润性增厚等侵袭特性,对于ACC的诊断和治疗方案的制订有重要价值.
Objective To observe CT manifestations of primary pulmonary adenoid cystic carcinoma (ACC). Methods CT images of 26 patients with primary pulmonary ACC confirmed with pathology were analyzed retrospectively. Results Of 26 patients, central type lesions presented in 24, and peripheral type lesions in 2 patients. The tumor located at cervical trachea in 5 patients, at thoracic trachea in 11, at segmental and above segmental bronchi in 8, and at sub-segmental bronchi in 2 patients. The lesions manifested as intra- and extraluminal growths (n=19) and intraluminal growths (n=7) as clear margin, homogenous low attenuation on plain CT and without significantly enhancement on contrast-enhanced CT scan. Conclusion Primary pulmonary ACC tends to be central lesion with low attenuation on plain CT scan and without significantly enhancement after contrast administration. Some invasive characteristics including extraluminal extension and infiltrative wall thickening can be showed clearly with CT. CT is valuable in the diagnosis and treatment planning of primary pulmonary ACC.
