【摘要】 目的 分析镰状韧带旁肝假性病灶(简称镰旁肝假病灶)的影像学征象及形成原理。方法 收集CT检查发现镰旁肝假病灶的患者40例(A型23例，B型17例),复习相关资料并结合2例活检、6例随访、5例MRI的结果，回顾性分析其CT平扫、增强密度的变化及其形成原理和机制。结果 25例镰旁肝假病灶动脉期呈低密度，13例呈等密度，2例呈稍高密度；40例镰旁肝假病灶门静脉期CT值均低于周围肝实质；27例镰旁肝假病灶延迟期呈低或略低密度，13例A型镰旁肝假病灶延迟扫描为等密度。2例A型镰旁肝假病灶MRI任何序列均呈等信号，反相位未观察到信号变化；3例B型镰旁肝假病灶反相位信号减低或稍减低。6例CT追踪随访2例A型镰旁肝假病灶无变化，4例B型镰旁肝假病灶缩小或消失；其中1例B型镰旁肝假病灶1月后MRI复查更变淡、缩小。结论 镰旁肝假病灶A型可由特殊血供引起，B型可由局灶脂肪浸润引起，其发生部位特殊，在CT、MRI上有特征性影像学表现，一般可明确诊断。更多还原

【Abstract】 Objective To discuss the imaging appearances and causes of hepatic pseudolesions around the falciform ligament.Methods 40 patients(23 cases of A-type,17 cases of B-type) of hepatic pseudolesion around the falciform ligament examined by CT were collected.Combined with pathology of 2 cases,follow-up of 6 cases,MRI findings in 5 cases,and with the relevant literature reviewes,the density change of CT plain and enhanced scan and the causes of hepatic pseudolesion around the falciform ligament were analyzed retrospectively.Results There were low density in 25 cases,isodensity in 13 cases,high density in 2 cases in arterial phase,density lower than that of liver in 40 cases in portal phase,low or slightly low density in 27 cases and isodensity in 13 case of A-type in delayed phase.Of 40 cases,there were isointense in 2 cases of A-type in any sequence,and no sigal changes on out-phase images;there were intensity decline on out-phase images comparing to in-phase images in 3 cases of B-type.Of 6 CT follow-up cases,there were no changes in 2 cases of A-type and shrinked or disappear in 4 cases of B-type;and there were more shrinked in 1 B-type case of MRI follow-up again after one month.Conclusion Hepatic pseudolesion of A-type can be resulted from focal fatty infiltration,and that of B-type can be caused by special blood-supply.They have characteristics in locations,and characteristic imaging appearances on CT and MRI images,and they can be clearly diagnosed generally.更多还原