肝外胆管梗阻病变的CT分析

肝外胆管梗阻性病变是临床上较常见的病症,笔者回顾性分析2003年3月～2006年11月行CT检查并经手术病理证实的59例患者的临床及影像资料,探讨肝内外胆管的CT征象、临床表现对判断良恶性梗阻的意义,旨在提高诊断水平.现总结报告如下.     

肝内胆管脓肿的CT诊断

目的 :探讨肝内胆管脓肿的CT诊断和鉴别诊断。方法 :回顾性分析经临床、病理证实的 2 7例肝内胆管脓肿患者的CT表现及临床资料。结果 :2 7例均可见肝脓肿及胆源性病变表现。肝脓肿CT平扫表现为低密度肿块 ,单发圆形(8例 )、多房或簇状 (9例 )或不规则多发 (10例 ) ,增强扫描示脓肿实质部分明显强化 ,呈“肿块缩小征”6例 ,“周围充血征”8例 ,“簇状征”9例 ,“环靶征”仅 4例。胆源性病变CT表现包括胆管扩张、胆管壁增厚并明显强化 ,胆道积气及胆道结石等。结论 :CT扫描可发现肝脓肿及胆道病变 ,是临床诊断肝内胆管脓肿最可靠的影像学方法。     

Bile duct carcinoma in a focal dilatation of the intrahepatic bile duct

A 40 year old male with bile duct carcinoma arising in a localised dilatation of the intrahepatic bile duct is presented. The patient presented with recurrent upper abdominal pain, fever and jaundice. Computed tomography showed a localised duct dilatation and ultrasound clearly demonstrated a tumor mass arising within the bile duct. At surgery, papillary adenocarcinoma was confirmed. This case suggests that the tumour arose from the pre-existing cyst. A localised dilatation of the bile duct on computed tomography and ultrasound may harbour a bile duct carcinoma.     

Toxic dilatation in Crohn disease with CT correlation

We describe the CT appearance of toxic dilatation in a patient with Crohn disease. The CT manifestations of this uncommon but important entity have not been previously described. The involved portion of the colon was mildly dilated and demonstrated pseudopolyp formation. Bowel wall thickening in this segment was minimal as expected in toxic dilatation. Intramural gas was identified representing pneumatosis intestinalis, an ominous sign in this condition.     

肝内胆管脓肿的CT特征探讨

目的 肝内胆管脓肿（intrahepatic bile duct abscess,IBDA）的CT表现特点及病理基础。方法 回顾性研究1989年10月至1999年2月经手术及临床抗炎治疗后复查证实的IBDA连续性病例31例的C T资料,病因包括多种原因所致的急性梗阻性化脓性胆管炎和胆道逆行感染。所有病例分别从肝脓肿征象、胆源性征象及反映两者间相关性的征象进行观察。结果 31例中均可见肝脓肿CT表现特征（31／31,100％）。胆源性CT表现包括各种梗阻病因的特征性 CT表现和其他胆道异常表现,包括胆管扩张（29／31,93.5％）、扩张的胆管与脓肿相通（5／31,16.1％）或相紧邻（8／31,25.8％）及胆道积气（10／31,32.2％）等。前两者间相关的CT表现,包括肝脓肿上与梗阻点及其近侧扩张胆管相一致（15／31,48.4％）,肝脓肿发生于无（7／31,22.6％）或有（４／３１,１２.９％）肝内胆管积气的肝叶、肝段等。结论 ＩＢＤＡ的ＣＴ表现包括肝脓肿征象、胆源性征象,并能反映两者间相关的具有一定特征的ＣＴ征象。     

Common bile duct cancer with massive necrosis mimicking choledochal dilatation on CT. Case report

Carcinomas of the common bile duct are usually seen as dilatation of the bile duct proximal to a solid mass on CT. In the case reported here, the common bile duct cancer itself mimicked dilated common bile duct on CT because of massive necrosis. In a case of simulating dilated common bile duct on CT, and discrepancy between CT and ultrasonography or endoscopic retrograde cholangiopancreatography, a common bile duct cancer with massive necrosis should be included in the differential diagnosis.     

Congenital bile duct dilatation (Caroli's disease--Grumbach's disease)

Congenital bile duct dilatation is an autosomal recessive inherited disease. Pathologically tortuous dilated, dysplastic intrahepatic bile ducts were found. It may be associated with hepatic fibrosis (Grumbach's disease), or without (Caroli's disease). A common additional finding is an infantile polycystic kidney. Three cases are reported and the radiological and sonographic findings are discussed.     

肝内外胆管及胆囊扩张程度和低位梗阻性黄疸病变的相关性

目的探讨肝内、外胆管及胆囊扩张程度、形式对低位梗阻性黄疸的诊断价值。方法回顾性分析105例低位阻塞性黄疸患者的CT和内窥镜逆行胰胆管造影（ERCP）的影像资料，将胆系扩张分为下列7种类型：Ⅰ型为肝内、外胆管及胆囊均重度扩张；Ⅱ型为肝外胆管、胆囊重度扩张伴肝内胆管轻度扩张；Ⅲ型为肝内、外胆管重度扩张伴胆囊不扩张或轻、中度扩张；Ⅳ型为肝外胆管重度扩张伴肝内胆管和胆囊不扩张或轻、中度扩张；Ⅴ型为肝内胆管重度扩张伴肝外胆管及胆囊不扩张或轻、中度扩张；Ⅵ型胆囊重度扩张伴肝内、外胆管不扩张或轻、中度扩张；Ⅶ型为肝内、外胆管及胆囊均不扩张或轻、中度扩张。结合手术和病理结果，分析各类型胆系扩展和其低位阻塞性黄疸病变的相关性。结果105例低位阻塞性黄疸中33例为肿瘤性病变，72例为非肿瘤性病变。肿瘤性病变中．Ⅰ型16例，Ⅱ型10例，Ⅲ型4例，Ⅳ型1例，Ⅶ型2例。非肿瘤性病变中，Ⅰ型4例，Ⅱ型4例，Ⅲ型9例，Ⅳ型33例，Ⅴ型2例，Ⅵ型11例，Ⅶ型9例。Ⅰ、Ⅱ型扩张和Ⅲ～Ⅶ型扩张在肿瘤和非肿瘤病变中差异有统计学意义（χ^2=47．33，P〈0．01）。结论低位阻塞性黄疸病变性质和肝内、外胆管及胆囊扩张程度密切相关：（1）Ⅰ型和Ⅱ型扩张提示绝大多数为肿瘤性病变，少数为嵌顿性结石。（2）Ⅲ～Ⅶ型扩张常为胆管、胆囊结石及炎症。     

多层螺旋CT曲面重建技术在胆总管扩张诊断中的应用

目的:研究胆总管扩张螺旋CT曲面重建技术(CPR)的操作方法、临床应用价值及其局限性。方法:收集20例胆总管扩张患者,将其1～3mm薄层扫描轴位源像(ASI)传到工作站后处理,行扩张胆总管曲面重建成像,作任意曲面显示所要观察的扩张胆总管。经手术病理及随访证实,评估CPR对胆总管扩张病因的定位与定性价值。结果:CPR对扩张胆总管的成像率达100%,均能显示完整的扩张胆总管及梗阻部位,定位准确率达100%,定性准确率达90%。结论:CPR能将不在同一平面的扩张胆总管显示于一个平面上,更好地显示扩张胆总管的连续性,可直观地显示胆总管扩张程度、部位及梗阻端形态,对诊断及鉴别诊断有重要价值。     

Normal intrahepatic bile ducts: CT depiction

Visualization of intrahepatic bile ducts (IHBDs) at computed tomography (CT) has previously been considered evidence of biliary obstruction. The authors have found that hepatic CT enhanced with contrast material and with the use of ceramic scintillation detectors allows frequent visualization of normal IHBDs. One hundred patients without imaging, laboratory, or clinical evidence of hepatobiliary or pancreatic disease were prospectively examined to assess the frequency of visualization, location, and size of IHBDs. IHBDs were visualized in 40% of the patients and had an average size of 2.0 mm in the central part of the liver and 1.8 mm in the peripheral part of the liver. Ducts were seen in the right lobe more often than in the left lobe. There was no statistically significant relationship between visualization of IHBDs and patient age. Demonstration of IHBDs on current CT scanners is a normal finding and does not indicate biliary obstruction.     

Radiologic features of intrahepatic bile duct adenoma: a look at the surface of the liver.

We report the radiological features of intrahepatic bile duct adenoma (BDA) in three patients. BDA was shown as a small mass located in the peripheral region of the liver with each imaging modality: a hypervascular mass on angiography and a mass appearing as early nodular enhancement found disproportionately evident compared with their small size and distinct delayed or prolonged enhancement on CT. BDA should be included in the diseases to be differentiated from hypervascular hepatic tumors.     

Animal model of bile duct dilatation created with minimally invasive surgery

RATIONALE AND OBJECTIVES: The purpose of the study was to evaluate a method of producing obstruction of the common bile duct and concomitant biliary duct dilatation in an animal model. MATERIALS AND METHODS: Laparoscopic placement of a double-balloon occlusion device was used to produce common bile duct obstruction and bile duct dilatation in pigs. RESULTS: One week after the procedure, common bile duct obstruction and dilatation of the biliary tree were demonstrated with either percutaneous transhepatic cholangiography or percutaneous cholecystography. CONCLUSION: The use of this method is technically feasible and provides a useful subacute and chronic animal model of common bile duct obstruction and dilatation of the biliary tree for percutaneous interventional training and research purposes.     

Computed tomography of localized dilatation of the intrahepatic bile ducts

Twenty-nine patients showed localized dilatation of the intrahepatic bile ducts on computed tomography, usually unaccompanied by jaundice. Congenital dilatation was diagnosed when associated with a choledochal cyst, while cholangiographic contrast material was helpful in differentiating such dilatation from a simple cyst cy showing its communication with the biliary tract when no choledochal cyst was present. Obstructive dilatation was associated with intrahepatic calculi in 4 cases, hepatoma in 9, cholangioma in 5, metastatic tumor in 5, and polycystic disease in 2. Cholangioma and intrahepatic calculi had a greater tendency to accompany such localized dilatation; in 2 cases, the dilatation was the only clue to the underlying disorder.