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超声造影及增强CT诊断肝脏血管周上皮样肿瘤1例

2019-03-12 严玺德 王振兴 李发斌 中国超声医学杂志

患者女,49岁,汉族,已婚,农民。以3d前右下肢出现大片状红斑到我院皮肤科就诊收住入院。体格检查:无明显异常。实验室检查:肿瘤标记物CA72413.6U/ml,其余阴性。超声检查:肝左叶见大小约61mm×56mm实性略高回声占位,边界清晰,内部回声不均匀,CDFI:肿块周边及内部见较丰富血流信号。超声造影:造影剂注入肿块后9s呈环状且向心性轮辐样高增强,10s迅速强化,30s逐渐消退,肿块边界清晰

患者女,49岁,汉族,已婚,农民。以3d前右下肢出现大片状红斑到我院皮肤科就诊收住入院。体格检查:无明显异常。实验室检查:肿瘤标记物CA72413.6U/ml,其余阴性。超声检查:肝左叶见大小约61mm×56mm实性略高回声占位,边界清晰,内部回声不均匀,CDFI:肿块周边及内部见较丰富血流信号。超声造影:造影剂注入肿块后9s呈环状且向心性轮辐样高增强,10s迅速强化,30s逐渐消退,肿块边界清晰,延迟期肿块包膜持续呈高增强(图1)。超声造影:肝脏良性占位性病变,肝腺瘤?FNH?增强CT所示:左叶团块影动脉期明显不均匀强化,门脉期部分廓清,病灶强化方式呈“快进快出”。诊断意见:肝实性占位,肝癌?腺瘤?
 


后行超声引导下经皮肝穿组织学活检。病理及免疫组化:(肝脏)具有血管周上皮样细胞分化的肿瘤。
 
讨论
 
肝脏血管周上皮样肿瘤(PEComa)于由BONETri等首先提出,该肿瘤多见于女性常好发于肾、子宫、软组织、消化道、眼眶等。然而发生于肝脏者较罕见,因此易引起漏诊或误诊。
 
超声对肝脏PEComa描述国内文献未见提及,肿瘤声像图无特征性表现,此例患者二维表现和肝脏常见占位性病变无法做出鉴别诊断。超声造影显示肿块包膜在延迟期持续高增强具有特征性,对诊断有意义。增强CT所示:左叶团块影动脉期明显不均匀强化,门脉期部分廓清。与李淑英等对肝脏PEComa CT增强扫描特点报道相似。肝脏PEComa多为单发,其超声造影征象需与其余肝占位鉴别。
 
(1)肝癌:一般有慢性肝病史,AFP明显升高,且肿瘤超声造影呈“快进快出”的典型增强模式。(2)肝血管瘤:增强模式为结节状高增强,呈典型的“快进慢出”表现。(3)局灶性结节增生:超声造影呈典型“轮辐状”强化,中央瘢痕逐渐强化。(4)肝腺瘤:多见于年轻女性,有口服避孕药史,其与PEComa影像学表现高度类似,但PEComa造影延迟期包膜持续强化方式或许与腺瘤有差异,但大多仍需病理学检查。
 
总之,肝脏PEComa临床非常罕见,虽然起病隐匿,症状也缺乏特异度4,但影像学表现仍有一定的特征,结合临床可提示性诊断。
 
原始出处:

严玺德,王振兴,李发斌.超声造影及增强CT诊断肝脏血管周上皮样肿瘤1例及分析[J].中国超声医学杂志,2018(02):190.

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    2019-04-12 zwjnj2

    学习学习学习

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    2019-03-14 sodoo
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    2019-03-14 qblt

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