胃癌根治术中肝动脉变异及意义

目的介绍胃癌根治术时发现肝动脉变异情况。方法回顾性分析208例胃癌根治术时遭遇的肝动脉变异情况。结果208例中发现肝动脉变异3例,术中游离时注意保留肝脏、胆囊的血供分支。结论胃癌根治术时应注意肝动脉变异可能,避免损伤邻近器官的血供。     

因症就诊检出早期大肠癌的临床及病理学特征

目的探讨在就诊的肛肠病人中如何提高早期大肠癌的检出率。方法在１１家医院推广对肛肠病人的四项检查程序——直肠指检，乙结镜检查，大便隐血试验，和Ｘ线气钡灌肠造影。结果在４８２１例有肛肠症状的病人中，检出大肠癌１８８例，检出率为３．９％，其中１８０例有术后病理诊断。４７／１８０例（２６．１％）属早期癌（ＤｕｋｅｓｓｔａｇｅＡ）。４１／４７例由上述四项检查作出初步诊断。初发症状为：（１）便血（２６例，持续１５．２±９．４周后就诊，肿瘤平均直径２．５８ｃｍ）；（２）大便习惯改变（９例，３３．４±１９．７周，３．３９ｃｍ）；（３）腹痛腹块（１０例，１９．２±１１．２周，５．０ｃｍ）；（４）贫血（２例，１７．２±９．９周，４．７５ｃｍ）。８／１２例的Ａ０和Ａ１期病例属便血组，并多位于直肠。４１／４７例以高、中分化腺癌为主，其中１５例伴有腺瘤癌变。术前曾作活检的２７例中，１２例未检出癌变细胞。结论四项检查对检出早期大肠癌是有效的，便血是提示早期癌最有价值的症状，加强大肠癌防治宣教，采用瘤灶多点或全瘤活检技术，高度重视大肠腺瘤和不典型增生等癌前病变，将有助于提高早期大肠癌的检出率     

Hepatic-pericardio-phrenic collateral (natural shunt) in a patient with Budd-Chiari syndrome

Hepatic venous outflow tract obstruction, Budd-Chiari syndrome (BCS), leads to portal hypertension and to the development of collaterals that bypass the obstruction. Described here is a BCS patient with an unusually large transdiaphragmatic collateral between the left hepatic and left innominate veins, which decompressed the oesophageal varices. This has not been reported earlier in the literature.     

Hepatic infarction with portal thrombosis

A case of hepatic infarction with portal thrombosis is reported. A 63-year-old woman with liver cirrhosis and esophageal varices was admitted for treatment of the esophagel varices. Endoscopic variceal ligation (EVL) and endoscopic injection sclerotherapy (EIS) were performed. Two months later, she experienced right hypochondralgia and right flank pain. Serum transaminase levels were suddenly elevated, and computed tomography scans of the liver showed multiple small nodular lesions. Her condition worsened, and she died of hepatic failure. Autopsy revealed splenic and portal vein thrombosis, multiple hepatic infarction, and evidence of chronic pancreatitis. We believe that liver cirrhosis and chronic pancreatitis were the main risk factors for the portal thrombosis, and the treatment for esophageal varices appeared to have triggered the thrombosis. The hepatic infarction was caused by the portal thrombosis.     

Disposition Characteristics of Macromolecules in Tumor-Bearing Mice

As part of the strategy for the design of macromolecular carriers for drug targeting, the disposition characteristics of macromolecules were studied in mice bearing tumors that served as target tissues. Eight kinds of macromolecules including four polysaccharides and four proteins with different molecular weights and electric charges were used; tissue distribution and tumor localization after intravenous injection were studied. Pharmacokinetic analysis revealed that the tissue radioactivity uptake rate index calculated in terms of clearance was different among the tested compounds; especially, the urinary radioactivity excretion clearances and the total hepatic radioactivity uptake clearances varied widely. Compounds with low molecular weights (approximately 10 kD) or positive charges showed lower tumor radioactivity accumulation; radioactivity was rapidly eliminated from the plasma via rapid urinary excretion or extensive hepatic uptake, respectively. On the other hand, large and negatively charged compounds, carboxymethyl dextran, bovine serum albumin, and mouse immunoglobulin G, showed higher radioactivity accumulation in the tumor (calculated total amounts were 15.6, 10.8, and 20.8% of the dose, respectively) and prolonged retention in the circulation. These results demonstrated that the total systemic exposure rather than the uptake rate index was correlated with total tumor uptake. Molecular weight and electric charge of the macromolecules significantly affected their disposition characteristics and, consequently, determined radioactivity accumulation in the tumor. It was concluded that a drug–carrier complex designed for systemic tumor targeting should be polyanionic in nature and larger than 70,000 in molecular weight.     

肝包虫囊肿的磁共振诊断

对１０例经手术证实的肝包虫囊肿（又称细粒棘球蚴病）的磁共振成像（ＭＲＩ）进行分析，认为其特征性表现为：囊壁呈光滑厚薄均一的低信号的包膜，在Ｔ２加权像上显示更加清楚；母囊内有数个大小不等的子囊，整个病灶呈多房性似玫瑰花状。本文对肝包虫囊肿与肝内其它囊性占位病变的鉴别诊断进行了探讨。     

Spontaneous subcapsular hepatic hemorrhage associated with pregnancy: Report of a case

We report herein a case of spontaneous subcapsular hepatic hemorrhage which occurred in a 33-year-old woman 1 day after she had been delivered of her second child by cesarean section following an uneventful pregnancy. She complained of right upper quadrant pain on the 1st postoperative day, and computed tomography (CT) showed subcapsular low-density masses in both liver lobes, while extravasation was demonstrated by CO₂ intraarterial digital subtraction angiography (IADSA). The hemorrhage was successfully controlled by transcatheter arterial embolization (TAE). However, on the 3rd day after TAE, an exploratory laparotomy was performed to establish an exact diagnosis to explain the persistent abdominal pain and abnormal liver function tests. Subcapsular hematomas in both lobes were confirmed and no visible laceration was present. The patient recovered gradually by spontaneous absorption of the hematomas and was discharged on the 22nd postoperative day. Spontaneous hepatic hemorrhage associated with pregnancy is a very rare complication, and establishing a correct diagnosis and initiating appropriate therapy are essential for this life-threatening disease.     

肝腺瘤的影像学诊断

目的探讨影像学(US、CT、MRI及DSA)诊断肝腺瘤的价值。方法回顾性分析经手术、病理证实的11例肝腺瘤的影像学表现,其中11例行US和CT检查(有1例行CT灌注成像,CTP),5例行MRI扫描,4例行DSA检查,并与手术病理所见对照。结果11例肝腺瘤均为单发肿块,无肝硬化背景,直径2.0～10.0cm。影像学表现:US检查,10例呈稍低或不均匀稍强回声,边界清晰,6例见低回声晕,彩色多普勒显示肿块内有较丰富的血流;CT检查,10例为稍低或等密度,8/10例动脉期全瘤明显强化,门脉期轻度强化,延迟期呈等密度,1例平扫和延迟期呈等密度,动脉期中度强化,门脉期轻度强化,误诊为血管瘤。1/11例CT灌注成像(CTP)检查,肝动脉灌注量(HAP)=1.08ml/(min.ml),门静脉灌注量(PVP)=0.19ml/(min.ml),肝动脉灌注指数(HPI)=0.85,各参数值与肝癌均有明显不同;MRI检查,5例肝腺瘤均能显示完整包膜,T1WI上2例稍高于肝脏信号,1例呈等信号,2例为稍低信号,T2WI上5例均表现为以稍高信号为主的混杂信号,脂肪抑制像(STIR)1例呈略低信号,4例信号与T2WI相似,行增强扫描的4例病灶动脉期显著强化,门脉期强化减退,平衡期呈等信号。DSA检查,3/4例病灶见粗细不均的异常血管影,实质期可见肿瘤染色表现。结论肝腺瘤的US和DSA表现均缺乏特异性,CT、MRI则具有一定的特点。CTP对肝腺瘤可能具有诊断和鉴别诊断价值。