镰状韧带旁肝左叶假病灶的螺旋CT表现  

Spiral CT features of pseudolesions in the left hepatic lobe adjacent to the falciform ligament

作　　者：罗天友[1] 史斌[1] 李咏梅[1] 吕发金[1] 袁书伟[1] 向东 吴景全[1] 

机构地区：[1]重庆医科大学附属第一医院放射科,重庆400016

出　　处：《第三军医大学学报》2004年第10期913-916,共4页Journal of Third Military Medical University

摘　　要：目的　研究镰状韧带旁肝左叶低密度假病灶 (简称镰旁肝假病灶 )的螺旋CT平扫及动态增强扫描表现特征。方法　 1999年 1月至 2 0 0 1年 9月 92 6例患者因各种原因接受了肝脏或上腹部螺旋CT扫描 ,共检出 63例 (男 2 7例 ,女3 6例 ;年龄 15～ 73岁 )具有镰旁肝假病灶 ,详细观察和记录其部位、大小、形状以及平扫与增强各期图像上的密度及其变化情况。结果　 63例 ( 6 8%)共有 66个镰旁肝假病灶 ,均位于肝左叶内侧段 ( 5 7个 )或 (和 )左叶外侧段 ( 9个 )前缘镰状韧带旁。 60例 ( 95 %)为单个镰旁肝假病灶 ,3例 ( 5 %)各有 2个镰旁肝假病灶 (分别位于左叶内侧段和左叶外侧段而呈对称性分布 )。据镰旁肝假病灶在平扫与双期增强图像上的密度及其变化情况将其分为A型和B型 ,其中A型 5 7例 60个( 91%) ,B型 6例 6个 ( 9%)。结论　镰旁肝假病灶并非很少见。其发生部位特殊 ,在螺旋CT平扫及动态增强扫描各期的密度及其变化有特征性表现。对镰旁肝假病灶应能正确识别 。Objective To investigate the features of low attenuation pseudolesion in the left hepatic lobe adjacent to the falciform ligament by unenhanced and dynamic enhanced spiral CT. Methods Spiral CT scanning of the liver or upper abdomen was performed in 926 patients with various causes from January 1999 to September 2001. Sixty three patients (27 male, 36 female; age range: 15-73 years) were identified to have low attenuation pseudolesion in the left hepatic lobe adjacent to the falciform ligament. The features of pseudolesions on unenhanced and all enhanced images were carefully analyzed. Results A total of 66 low attenuation pseudolesions, 57 at the anterior border adjacent to the falciform ligament of the medial segment of left lobe of liver, and 9 at that of the lateral segment of left lobe of liver, were found in 63 patients (6.8%). Single pseudolesion was found in 60 patients (95%), but 3 patients (5%) had 2 pseudolesions located symmetrically in the medial segment of the left lobe and the lateral segment of the left lobe, respectively. The pseudolesions were divided into type A (60 pseudolesions, 91%) and type B (6 pseudolesions, 9%) according to their attenuations and the changes of attenuations on the unenhanced and dynamic enhanced spiral CT images. Conclusion Low attenuation pseudolesions are not unusual in the left hepatic lobe around the falciform ligament by spiral CT. They have characteristics in locations, attenuations, and changes of attenuations on unenhanced and dynamic enhanced spiral CT images. Radiologists should recognize these pseudolesions correctly for avoiding misdiagnosis.

关 键 词：肝左叶 假病灶 镰状韧带 体层摄影术 X线计算机 

分 类 号：R447[医药卫生—诊断学] R575[医药卫生—临床医学]