非肝硬化性门静脉高压症的研究现状

肝硬化是门静脉高压的最常见原因,但仍有约20%的门静脉高压继发于非肝硬化因素,称为非肝硬化性门静脉高压症(NCPH),在发展中国家发病率较高。NCPH是一组异源性的肝脏血管疾病,临床上多见的是特发性门静脉高压(IPH)、肝外门静脉血管阻塞(EHPVO),以及布加综合征、先天性肝纤维化和结节再生性增生等少见病。此类患者常常具有门静脉高压的证据,如反复发生的静脉曲张出血和脾脏肿大,但肝功能保存尚好。目前尚无诊断NCPH的统一标准,对其诊断仍是一个挑战。临床上往往采用排除性诊断,必要时可行肝穿刺活组织检查来确诊。介绍了IPH和EHPVO的发病机制、病理表现、诊断方法及治疗策略的选择,若能有效控制上消化道出血,NCPH被认为是预后相对良好的一类疾病。     

特发性非肝硬化性门静脉高压症的研究进展

特发性非肝硬化性门静脉高压症(INCPH)是一种罕见的血管性肝病,近年来引起了人们新的关注。INCPH在组织学改变、血流动力学特征和临床结果方面与肝硬化不同。重要的是,其病因和发病机制尚不清楚,但已确定与肝内血管疾病的发展有关,并在排除引起门静脉高压的其他原因(如肝硬化以及其他导致门静脉高压的窦前性、窦性、窦后性原因和内脏静脉血栓形成)后做出的。此外,特发性非肝硬化性门静脉高压症的总体预后优于肝硬化患者,但对症治疗(控制胃食管静脉曲张出血和预防血栓形成)仍是主要治疗方法。目前临床上对INCPH的认识相对不足,对该病易发生误诊,本文通过目前对INCPH研究进展的阐述,以提高临床医生对此病的认识。     

特发性非肝硬化性门静脉高压症的研究进展

特发性非肝硬化性门静脉高压是一种原因不明的门静脉高压症,无明显肝硬化特征;本病的发病机制尚不清楚,目前认为慢性感染、免疫、毒物接触、凝血机制障碍等均可能参与发病。临床主要表现为门静脉高压征象,如食管胃底静脉曲张或破裂出血、显著脾肿大,而肝功能基本正常,腹水及肝性脑病少见;病理改变主要表现为门静脉闭塞性病变,但无肝硬化改变。临床诊断主要是排他性诊断,有门静脉高压的临床证据,组织病理学检查除外肝硬化,排除引起肝硬化的慢性肝病以及引起非肝硬化性门静脉高压的其他临床疾病即可考虑本病。有关特发性非肝硬化性门静脉高压症研究较少,推荐按照肝硬化所致门静脉高压指南进行治疗。预后主要取决于门静脉高压的严重程度及其并发症的处理,一般优于肝硬化并食管胃底静脉曲张破裂出血。     

重视非肝硬化性门静脉高压的诊断和治疗

非肝硬化性门静脉高压(NCPH)是指除肝硬化外多种疾病导致的门静脉高压症。NCPH常见的原因有门静脉血栓形成、先天性肝纤维化和特发性门静脉高压等。这组疾病的主要特点是门静脉高压相关的表现突出,而肝功能储备相对较好,鉴别该类疾病需要临床,影像学和病理学的深入检查。通过适当的内外科治疗,多数患者预后较好。     

特发性非肝硬化性门静脉高压症的临床及病理特点分析

目的 探讨特发性非肝硬化性门静脉高压症(INCPH)的临床及病理特点.方法 回顾性分析44例患者的临床资料,其中23例为INCPH,21例为病毒性肝炎失代偿期肝硬化,比较二者之间的差异,同时分析23例INCPH患者的病理特点.结果 INCPH组以女性(60.87％)为主,年龄较轻(39.8±15.4)岁,而病毒性肝炎失...     

特发性非肝硬化门静脉高压症患者肝脏影像学和病理学特征分析

目的 分析特发性非肝硬化门静脉高压症(INCPH)患者肝脏影像学和病理学特征,并与肝硬化的鉴别要点。方法 2016年1月～2021年7月我院收治的INCPH患者16例和乙型肝炎肝硬化患者28例,常规进行超声、CT和MRI及肝穿刺活检检查。结果 INCPH与肝硬化患者在影像学检查发现的弥漫性结节样改变(0.0%对35.7%)、门静脉直径【9.7(7.2,11.6)mm对13.6(9.2,15.7)mm】、门静脉壁厚【2.6(1.4,4.0)mm对1.4(1.1,1.6)mm】方面比较,差异具有统计学意义(P<0.05);肝组织学检查发现,INCPH与肝硬化患者在门静脉区域纤维化、肝膈膜纤维化、肝小叶间静脉闭塞、肝细胞坏死和肝细胞水肿或脂肪变性方面【分别为100.0%对0.0%、18.7%对92.8%、56.2%对10.7%、0.0%对75.0%和12.5%对89.3%】,差异具有统计学意义(P<0.05)。结论 INCPH仍是一种病因不明的疾病,注意分析影像学和组织病理学特征可以作出与肝硬化的鉴别诊断。     

非肝硬化性门脉高压的临床诊断

门静脉高压症是指各种原因导致的门静脉压力升高,临床表现为脾肿大、脾功能亢进症、食管胃底静脉曲张和腹水等临床症候群。根据病变部位的不同,门脉高压可分为肝前性、窦前性、窦性、窦后性和肝后性门脉高压[1]。引起门脉高压的最常见病因是肝硬化,属于窦性门脉高压,约占我国患者的80%~85%,而非肝硬化性门脉高压(non-cirrhotic portal hypertension,NCPH)是指患者有明显的门脉高压表现,但临床生化、影像学或组织学上无肝硬化证据的一组疾病,包括肝外门静脉闭塞症、先天性肝纤维化、特发性非硬化性门脉高压、肝窦阻塞综合征和布加综合征等[2]。NCPH患者与肝硬化门脉高压症患者在病因、治疗和预后方面有明显的不同,因此应重视对该组疾病的认识。本文对常见的NCPH疾病进行了简述,期待提高临床医生对该组疾病的认识。     

Diagnostic challenges in non-cirrhotic portal hypertension-porto sinusoidal vascular disease

Non-cirrhotic portal hypertension consists of a group of diseases characterized by signs and complications of portal hypertension,which differ from cirrhosis through histological alterations,hemodynamic characterization and, clinical outcome.Because of the similarities in clinical presentation and imaging signs,frequently these patients,and particularly those with porto-sinusoidal vascular disease(PSVD), are misdiagnosed as having liver cirrhosis and thus raising difficulties in their diagnosis.The most challenging differentiation to be considered is between PSVD and cirrhosis and, although not pathognomonic,liver biopsy is still the standard of diagnosis.Although they still require extended validation before being broadly used,new non-invasive methods for the diagnosis of porto-sinusoidal vascular disease,like transient elastography,contrast-enhanced ultrasound or metabolomic profiling,have shown promising results.Another issue is the differentiation between PSVD and chronic extrahepatic portal vein obstruction,especially now when it is known that 40% of patients suffering from PSVD develop portal vein thrombosis.In this particular case,once the portal vein thrombosis occurred,the diagnosis of PSVD is impossible according to the current guidelines.Moreover,so far,the differentiation between PSVD and sinusoidal obstruction syndrome has not been dear so far in particular circumstances.In this review we highlighted the diagnostic challenges regarding the PSVD, as well as the current techniques used in the evaluation of these patients.     

非肝硬化门脉高压患者临床特点分析

目的 总结非肝硬化门脉高压症(NCPH)患者的临床特点和肝静脉压力梯度(HVPG)的变化.方法 2017年1月～2019年12月南京市第二医院住院的28例NCPH患者,采用Seldinger法穿刺右侧颈内静脉,使用一次性球囊导管测定肝静脉压力,计算HVPG,接受肝活检检查.结果 在本组28例NCPH患者中,诊断特发性门...     

Non-cirrhotic portal hypertension with large regenerative nodules: a diagnostic challenge

Non-cirrhotic portal hypertension is a poorly understood condition characterized by portal hypertension in the absence of conventional hepatic cirrhosis and described in association with blood coagulation disorders, myeloproliferative and immunological diseases and with exposure to toxic drugs. Very recently, precise classification criteria have been proposed in order to define four distinct subcategories. The present case highlights how the clinical presentation, the confounding results from imaging studie...     

Clinical characteristics of idiopathic portal hypertension

Idiopathic portal hypertension is one of the interesting causes of portal hypertension. Even in very developed medical centers, this disorder is still one of the most important misdiagnoses of clinical practice. To inexperienced physicians, presenting esophageal varices and upper gastrointestinal bleeding usually prompt an unfortunate diagnosis of cirrhosis. A heterogenous clinical presentation and progression of this disorder should be recognized by physicians, and management should be directed towards some specific problems confined to this disorder. Although a genetic basis and other factors are implicated in its pathogenesis, exact underlying mechanism（s） is （are） unknown. In this review, we discuss the heterogeneity of idiopathic portal hypertension, its etiopathogenesis, clinical presentation and management issues. With the expectation of an excellent prognosis, a practicing gastroenterologist should be aware that ＂not all varices mean cirrhosis＂.     

Pediatric non-cirrhotic portal hypertension:Endoscopic outcome and perspectives from developing nations

Non-cirrhotic portal hypertension(NCPH) forms an important subset of portal hypertension in children. Variceal bleed and splenomegaly are their predominant presentation. Laboratory features show cytopenias(hypersplenism) and preserved hepatic synthetic functions. Repeated sessions of endoscopic variceal ligation or endoscopic sclerotherapy eradicate esophageal varices in almost all cases. After variceal eradication, there is an increased risk of other complications like secondary gastric varices, cholangiopathy, colopathy, growth failure,especially in extra-hepatic portal vein obstruction(EHPVO). Massive splenomegaly-related pain and early satiety cause poor quality of life(QoL). Meso-Rex bypass is the definitive therapy when the procedure is anatomically feasible in EHPVO. Other portosystemic shunt surgeries with splenectomy are indicated when patients present late and spleen-related issues predominate. Shunt surgeries prevent rebleed, improve growth and QoL. Non-cirrhotic portal fibrosis(NCPF) is a less common cause of portal hypertension in children in developing nations.Presentation in the second decade, massive splenomegaly and patent portal vein are discriminating features of NCPF. Shunt surgery is required in severe cases when endotherapy is insufficient for the varices. Congenital hepatic fibrosis(CHF)presents with firm palpable liver and splenomegaly. Ductal plate malformation forms the histological hallmark of CHF. CHF is commonly associated with Caroli's disease, renal cysts, and syndromes associated with neurological defects.Isolated CHF has a favourable prognosis requiring endotherapy. Liver transplanta-tion is required when there is decompensation or recurrent cholangitis, especially in Caroli's syndrome. Combined liver-kidney transplantation is indicated when both liver and renal issues are present.     

Non-cirrhotic portal fibrosis: current concepts and management

Non-cirrhotic portal hypertension (NCPH) comprises diseases having an increase in portal pressure (PP) due to intraheptic or prehepatic lesions, in the absence of cirrhosis. The lesions are generally vascular, either in the portal vein, its branches or in the perisinusoidal area. Because the wedged hepatic venous pressure is near normal, measurement of intravariceal or intrasplenic pressure is needed to assess PP. The majority of diseases included in the category of NCPH are well-characterized disease entities where portal hypertension (PHT) is a late manifestation and, hence, these are not discussed. Two diseases that present only with features of PHT and are common in developing countries are non-cirrhotic portal fibrosis (NCPF) and extrahepatic portal vein obstruction (EHPVO). Non-cirrhotic portal fibrosis is a syndrome of obscure etiology, characterized by 'obliterative portovenopathy' leading to PHT, massive splenomegaly and well-tolerated episodes of variceal bleeding in young adults from low socioeconomic backgrounds, having near normal hepatic functions. In some parts of the world, NCPF is called idiopathic portal hypertension (IPH) or 'hepatoportal sclerosis'. Because 85-95% of patients with NCPF and EHPVO present with variceal bleeding, treatment involves management with endoscopic sclerotherapy (EST) or variceal ligation (EVL). These therapies are effective in approximately 90-95% of patients. Gastric varices are another common cause of upper gastrointestinal bleeding in these patients and these can be managed with cyanoacrylate glue injection or surgery. Other indications for surgery include failure of EST/EVL, and symptomatic hypersplenism. The prognosis of patients with NCPF is good and 5 years survival in patients in whom variceal bleeding can be controlled has been reported to be approximately 95-100%.     

特发性非肝硬化门静脉高压症诊治进展

特发性非肝硬化门静脉高压症(idiopathic non-cirrhotic portal hypertension,INCPH)是一种罕见疾病,特点是在无肝硬化、无其他导致肝脏疾病的病因以及无内脏静脉血栓病因存在的情况下,出现的门静脉高压.该病的发病机制尚不清楚,但其病理学特征明显有别于肝硬化.在临床实践中,INCP...     

Non-cirrhotic portal fibrosis (idiopathic portal hypertension): experience with 151 patients and a review of the literature

BACKGROUND: Non-cirrhotic portal fibrosis (NCPF), the equivalent of idiopathic portal hypertension in Japan and hepatoportal sclerosis in the United States of America, is a common cause of portal hypertension in India. The clinical features, portographic and histological findings, and management of 151 patients with non-cirrhotic portal fibrosis are presented. METHODS: The disease is diagnosed by the presence of unequivocal evidence of portal hypertension in the definite absence of liver cirrhosis and extrahepatic portal vein obstruction (EHPVO). Retrospective analysis of records of 151 patients with NCPF was analyzed for the clinical presentation, physical findings, laboratory tests, radiological and histological findings, and for the outcome of treatment. RESULTS: The disease is characterized by massive splenomegaly with anemia, preserved liver function and benign prognosis in a majority of patients. Splenoportovenography (SPV) showed massive dilatation of the portal and splenic veins, and the presence of collaterals. Twenty-four (15.9%) patients showed evidence of natural/spontaneous shunts (splenorenal 15, umbilical nine) on SPV; these patients had a lower incidence of variceal bleeding. Liver histology demonstrated maintained lobular architecture, portal fibrosis of variable degree, sclerosis and obliteration of small-sized portal vein radicles, and subcapsular scarring with the collapse of the underlying parenchyma. Piecemeal or hepatocytic necrosis was absent in all histology specimens. Three patients showed nodular transformation along with abnormal liver functions, and may represent late manifestation of NCPF where features are similar to those seen in patients with incomplete septal cirrhosis. In the initial part of the study, surgery (side-to-side lieno-renal shunt) was the preferred modality of treatment, however, endoscopic sclerotherapy or variceal ligation has now become the preferred first line of management of variceal bleeding. CONCLUSIONS: The epidemiological and clinical features of NCPF have more similarity to IPH than has previously been documented. The development of spontaneous shunts tends to protect these patients from variceal bleeding.