腹 部影像 学 A B D O M lN A L IMA G lNG 肝腺瘤的MR征象分析 徐鹏举 曾蒙苏 单 艳 林 江 纪 元 【 摘要 】目的: 与病理对照, 描述和分析肝腺瘤 (HCA ) 的MR影像特征。方法: 对15例病人共16个经手术病理 证实的HCA 资料行回顾性分析, 包括病灶的大。 形态、 平扫T 功口 权、 T2JJll权信号强度及均匀性, 有无含脂肪 成分、出血、 囊变坏死, 动态增强的特征, 有无假包膜, 周围肝实质有无脂肪肝或肝硬化背景。 结果: 16个病灶 大小2. 5~ 29. 0cm (平均10. 3± 7. 5cm) ; 13个 (81. 3%) 病灶形态规则, 呈圆形或椭圆形, 3个病灶形态不规则, 呈巨块伴分叶状改变; 平扫显示4个病灶信号均匀, 12个病灶信号不均匀, T1w I显示8个病灶为高信号, T2WI 显示8个病灶为等或低信号; M R显示含脂质的病灶4个, M R显示出血病灶8个, 囊变坏死10个, 显示包膜征象 1O个, 所有病灶均为富血供病变; 所有病例周围肝实质均无肝硬化, 2例有轻度脂肪肝。 结论: 在没有肝硬化背 景基础上发生的富血供的信号不均匀肿块 , 且伴T1 高信号和包膜是肝腺瘤一定特征的MR征象。 【 关键词】肝疾。 肝腺瘤; 磁共振成像 中图分类号: R735. 7文献标志码: B 文章编号: 1006 — 5741(2013) . 06 . 0509 — 05 H ep atOc ell u lar A d eno m a:A n aly sis of M a gn eti c R es on an c e Im a gin g F eatu r es X U Peng~ u , ZE NG Meng— SU , S HA N Y an , L IN J iang , J I Y uan。 【 A bstract 】 Purpose:Compared with histopathologic findings, to describe the magnetic resonance imaging features of hepatocellular adenoma (HCA). M ethods: M R findings of 16 pathologically proved h ep ato c el lu l ar a d en om a i n 1 5 p ati en ts w er e r etrOsp ect iv e1y an a ly ze d .Im a ge an a ly si s i n clu d ed th e fo l low i ng : maximum size of lesion, contour (regular or lobulated), signal intensity (SI) and overall homogeneity on T 1,T 2 一 w ei g hted i ma ge s, pre se nce of r eg i on of steatosi s, pre se nce of m acr osc opi c hem or rhag i c component (defined as focal T 1-weighted hyperintense area), presence of necrotic or cy stic component (defined as pronounced hyperintense signal on T 2一 weighted images) within the lesion, presence of pseudocapsule (1 ow or high signal intensity on T 2W I and delayed phase enhancement), dynamic enhancement pattern of lesion, presen ce of ste ato sis or c irrhosis in surrounding l iv e r p are nchy m a . R esu lt s:T he si ze w as 2 . 5- 29. 0cm (mean 10. 35: 7. 5cm) for all 16 lesions. T he morphology of 13 lesions was reg ular with round or oval shape. Tumor heterogeneity was observed in 12 (75%) lesions. Hyperintensity on T 1w 1 was observed in 8 (50%) adenomas; hypointensity or isointensity on T 2W 1 was observed in 8 (50%) lesions. T he steatosis component i n 4 a denom as w a s show n by M R I . P re sence of m ac roscopi c he morr hag i c . ne croti c or cy sti c com ponent and pseudocapsule was observed in 8 (5O%),10(62 . 5%) and 10(62. 5%) adenomas, respectively. A ll lesions w er e show n as hy per v aseul ar by M R I . T he su rr oundi ng l iv er par enchy m a had no ci rr hosi s i n al l ca se s and 2 patients had mild fatty liv er. C on clu sion : T he hy perv ascular m ass w ithout c irrhosis back ground, associated w ith sig n al h ete ro g en ei ty an d h y p er i nten si ty o n T 1W I , p re se n ce of p seu d oc ap su l e , ar e com m on M R featu r es of H C A . 【 K ey words 】 Liver diseases; Hepatocellular adenoma; Magnetic resonance imaging 中国医学计算机成像杂志, 2013, 19: 509. 513 作者单位: 1 复旦大学附属中山医院放 射诊断科 ; 上海市影像医学研 究所 2 复旦大学附属 中山医院病理科 通信地址: 上海市徐汇 区枫林路180 号, 上海 200032 通信作者: 徐鹏举 ( 电子邮箱: xu. pengj u@ ZS-hospita1 . sh cn) ——50 9 — — C hin C o m put M e d Im a g , 2 0 1 3 。 19 : 5 0 9 。 51 3 1 D e pa rt m e nt of D ia g no st ic R a diolog y , Z hong s ha n H os pit a l,F uda n U niv e rs it y ; S ha ng ha i Inst itute of M e dica l Im a g ing 2 D e pa rt me nt of P at holo g y, Z hong s ha n H os pita l, F uda n U niv e rs ity A ddre ss : 1 8 0 F e ng lin R d , S ha ng ha i 2 0 0 0 3 2 , P. R . C A ddress C orre sp0nde nce to XU Peng -ju (E ·ma il: xu pengju@ ZS- hospita1 . sh. cn)