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ESTUDIOS


18 diciembre 2015

WORLD JOURNAL OF HEPATOLOGY. Therapeutic and clinical aspects of portal vein thrombosis in patients with cirrhosis

Massimo Primignani, Giulia Tosetti, Vincenzo La Mura

Portal vein thrombosis (PVT) is a frequent complication in cirrhosis, particularly in advanced stages of the disease. As for general venous thromboembolism, risk factors for PVT are slow blood flow, vessel wall damage and hypercoagulability, all features of advanced cirrhosis. Actually, the old dogma of a hemorrhagic tendency in cirrhosis has been challenged by new laboratory tools and the clinical evidence that venous thrombosis also occurs in cirrhosis. The impaired hepatic synthesis of both pro- and anticoagulants leads to a rebalanced hemostasis, more liable to be tipped towards thrombosis or even bleeding.

14 febrero 2016

WORLD JOURNAL OF GASTROENTEROLOGY. Combined locoregional treatment of patients with hepatocellular carcinoma: State of the art

Roberto Iezzi, Maurizio Pompili, Alessandro Posa, Giuseppe Coppola, Antonio Gasbarrini, Lorenzo Bonomo

In recent years, a combination of intervention therapies has been widely applied in the treatment of hepatocellular carcinoma (HCC). One such combined strategy is based on the combination of the percutaneous approach, such as radiofrequency ablation (RFA), and the intra-arterial locoregional approach, such as trans-arterial chemoembolization (TACE). Several types of evidence have supported the feasibility and benefit of combined therapy, despite some studies reporting conflicting results and outcomes. The aim of this review was to explain the technical aspects of different combined treatments and to comprehensively analyze and compare the clinical efficacy and safety of this combined treatment option and monotherapy, either as TACE or RFA alone, in order to provide clinicians with an unbiased opinion and valuable information. Based on a literature review and our experience, combined treatment seems to be a safe and effective option in the treatment of patients with early/intermediate HCC when surgical resection is not feasible; furthermore, this approach provides better results than RFA and TACE alone for the treatment of large HCC, defined as those exceeding 3 cm in size. It can also expand the indication for RFA to previously contraindicated “complex cases”, with increased risk of thermal ablation related complications due to tumor location, or to “complex patients” with high bleeding risk.

28 enero 2016

WORLD JOURNAL OF GASTROENTEROLOGY. Vascular complications after adult living donor liver transplantation: Evaluation with ultrasonography

Lin Ma, Qiang Lu, Yan Luo

Living donor liver transplantation (LDLT) has been widely used to treat end-stage liver disease with improvement in surgical technology and the application of new immunosuppressants. Vascular complications after liver transplantation remain a major threat to the survival of recipients. LDLT recipients are more likely to develop vascular complications because of their complex vascular reconstruction and the slender vessels. Early diagnosis and treatment are critical for the survival of graft and recipients. As a non-invasive, cost-effective and non-radioactive method with bedside availability, conventional gray-scale and Doppler ultrasonography play important roles in identifying vascular complications in the early postoperative period and during the follow-up. Recently, with the detailed vascular tracing and perfusion visualization, contrast-enhanced ultrasound (CEUS) has significantly improved the diagnosis of postoperative vascular complications. This review focuses on the role of conventional gray-scale ultrasound, Doppler ultrasound and CEUS for early diagnosis of vascular complications after adult LDLT.

28 enero 2016

WORLD JOURNAL OF GASTROENTEROLOGY. Current diagnosis and treatment of benign biliary strictures after living donor liver transplantation

Jae Hyuck Chang, Inseok Lee, Myung-Gyu Choi, Sok Won Han

Despite advances in surgical techniques, benign biliary strictures after living donor liver transplantation (LDLT) remain a significant biliary complication and play an important role in graft and patient survival. Benign biliary strictures after transplantation are classified into anastomotic or non-anastomotic strictures. These two types differ in presentation, outcome, and response to therapy. The leading causes of biliary strictures include impaired blood supply, technical errors during surgery, and biliary anomalies. Because patients usually have non-specific symptoms, a high index of suspicion should be maintained. Magnetic resonance cholangiography has gained widespread acceptance as a reliable noninvasive tool for detecting biliary complications.

28 noviembre 2015

WORLD JOURNAL OF GASTROENTEROLOGY. Management of early hepatic artery occlusion after liver transplantation with failed rescue

Chih-Yang Hsiao, Cheng-Maw Ho, Yao-Ming Wu, Ming-Chih Ho, Rey-Heng Hu, Po-Huang Lee

Hepatic artery thrombosis is a serious complication after liver transplantation which often results in biliary complications, early graft loss, and patient death. It is generally thought that early hepatic artery thrombosis without urgent re-vascularization or re-transplantation almost always leads to mortality, especially if the hepatic artery thrombosis occurs within a few days after transplantation. This series presents 3 cases of early hepatic artery thrombosis after living donor liver transplantation, in which surgical or endovascular attempts at arterial re-vascularization failed. Unexpectedly, these 3 patients survived with acceptable graft function after 32 mo, 11 mo, and 4 mo follow-up, respectively. The literatures on factors affecting this devastating complication were reviewed from an anatomical perspective. The collective evidence from survivors indicated that modified nonsurgical management after liver transplantation with failed revascularization may be sufficient to prevent mortality from early hepatic artery occlusion. Re-transplantation may be reserved for selected patients with unrecovered graft function.

28 diciembre 2015

WORLD JOURNAL OF GASTROENTEROLOGY. Comparison of percutaneous radiofrequency ablation and CyberKnife® for initial solitary hepatocellular carcinoma: A pilot study

Kazue Shiozawa, Manabu Watanabe, Takashi Ikehara, Yasushi Matsukiyo, Michio Kogame, Yui Kishimoto, Yusuke Okubo, Hiroyuki Makino, Nobuhiro Tsukamoto, Yoshinori Igarashi, Yasukiyo Sumino

AIM: To compare therapeutic outcomes and adverse events in initial solitary hepatocellular carcinoma (HCC) treated with radiofrequency ablation (RFA) and CyberKnife®.

07 enero 2016

WORLD JOURNAL OF GASTROENTEROLOGY. Treatment of hepatocellular carcinoma with portal venous tumor thrombosis: A comprehensive review

Kichang Han, Jin Hyoung Kim, Gi-Young Ko, Dong Il Gwon, Kyu-Bo Sung

The natural history of hepatocellular carcinoma (HCC) with portal vein tumor thrombosis (PVTT) is dismal (approximately 2-4 mo), and PVTT is reportedly found in 10%-40% of HCC patients at diagnosis. According to the Barcelona Clinic Liver Cancer (BCLC) Staging System (which is the most widely adopted HCC management guideline), sorafenib is the standard of care for advanced HCC (i.e., BCLC stage C) and the presence of PVTT is included in this category. However, sorafenib treatment only marginally prolongs patient survival and, notably, its therapeutic efficacy is reduced in patients with PVTT.

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