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https://www.readbyqxmd.com/read/28102946/a-portal-dosimetry-dose-prediction-method-based-on-collapsed-cone-algorithm-using-the-clinical-beam-model
#1
J Martínez Ortega, N Gómez González, P Castro Tejero, M Pinto Monedero, N B Tolani, L Núñez Martín, R Sánchez Montero
PURPOSE: Amorphous silicon electronical portal imaging devices (EPIDs) are widely used for dosimetric measurements in Radiation Therapy. The purpose of this work was to determine if a portal dose prediction method can be utilized for dose map calculations based on the linear accelerator model within a commercial treatment planning system (Pinnacle(3) v8.0 m). METHODS: The method was developed for a 6 MV photon beam on the Varian Clinac 21-EX, at a nominal dose rate of 400 MU/min...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102583/successful-splenorenal-shunt-occlusion-with-balloon-occluded-retrograde-transvenous-obliteration-yielded-improvement-of-residual-liver-function-enabled-administration-of-direct-acting-antivirals-and-achieved-sustained-virologic-response-to-hepatitis-c-virus
#2
Hironori Ochi, Michiko Aono, Shunji Takechi, Toshie Mashiba, Tomoyuki Yokota, Kouji Joko
We report the use of balloon-occluded retrograde transvenous obliteration (BRTO) for portosystemic shunt in one patient, resulting in marked improvements in residual liver function and enabling safe hepatitis C virus (HCV) elimination with direct-acting antiviral agents. A woman undergoing outpatient treatment at our institution for HCV-related cirrhosis with a history of hepatocellular carcinoma (HCC) treatment developed hepatic encephalopathy (HE; Child-Pugh score 8) at age 65 years. Improvement was obtained with conservative treatment; however, contrast-enhanced computed tomography revealed a splenorenal shunt with decreased portal vein blood flow...
January 19, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28102120/intestinal-mononuclear-phagocytes-in-health-and-disease
#3
Theodore J Sanders, Ulf Yrlid, Kevin J Maloy
The intestine is the tissue of the body with the highest constitutive exposure to foreign antigen and is also a common entry portal for many local and systemic pathogens. Therefore, the local immune system has the unenviable task of balancing efficient responses to dangerous pathogens with tolerance toward beneficial microbiota and food antigens. As in most tissues, the decision between tolerance and immunity is critically governed by the activity of local myeloid cells. However, the unique challenges posed by the intestinal environment have necessitated the development of several specialized mononuclear phagocyte populations with distinct phenotypic and functional characteristics that have vital roles in maintaining barrier function and immune homeostasis in the intestine...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28101681/extended-liver-venous-deprivation-before-major-hepatectomy-induces-marked-and-very-rapid-increase-in-future-liver-remnant-function
#4
Boris Guiu, François Quenet, Laure Escal, Frédéric Bibeau, Lauranne Piron, Philippe Rouanet, Jean-Michel Fabre, Eric Jacquet, Alban Denys, Pierre-Olivier Kotzki, Daniel Verzilli, Emmanuel Deshayes
OBJECTIVE: The aim of this study was to assess the safety and efficacy of extended liver venous deprivation (eLVD), i.e. combination of right portal vein embolisation and right (accessory right) and middle hepatic vein embolisation before major hepatectomy for future remnant liver (FRL) functional increase. METHODS: eLVD was performed in non-cirrhotic patients referred for major hepatectomy in a context of small FRL (baseline FRL <25% of the total liver volume or FRL function <2...
January 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28101354/histological-complete-response-in-a-patient-with-advanced-biliary-tract-cancer-treated-by-gemcitabine-cisplatin-s-1-combination-chemotherapy-a-case-report
#5
Tokuhiro Matsubara, Tsutomu Nishida, Yoshito Tomimaru, Masashi Yamamoto, Shiro Hayashi, Sachiko Nakajima, Koji Fukui, Keizo Dono, Shiro Adachi, Tatsuya Ioka, Masashi Kanai, Masami Inada
A 68-year-old woman was referred to our hospital with increased levels of biliary enzymes. On imaging, the patient was diagnosed with unresectable intrahepatic biliary tract cancer (BTC) with invasion of the portal vein and para-aortic lymph node metastasis (cT3N1M1, cStage IVb) and underwent endoscopic biliary drainage for the biliary stricture prior to therapy. The patient was subsequently enrolled in a phase III randomized trial (UMIN000014371/NCT02182778) and randomly assigned to receive gemcitabine/cisplatin/S-1 (GCS) combination therapy intravenously at doses of 1,000 or 25 mg/m(2) on day 1 and orally twice daily at a dose of 80 mg/m(2) on days 1-7 every 2 weeks...
December 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28100901/pancreas-transplant-with-duodeno-duodenostomy-and-caval-drainage-using-a-diamond-patch-graft-a-single-center-experience
#6
Je Ho Ryu, Tae Beom Lee, Young Mok Park, Kwang Ho Yang, Chong Woo Chu, Jung Hee Lee, Taeun Kim, Byung Hyun Choi
BACKGROUND The surgical technique used in pancreas transplant is essential for patient safety and graft survival, and problems exist with conventional strategies. When enteric exocrine drainage is performed, there is no method of immunologic monitoring other than direct graft pancreas biopsy. The most common cause of early graft failure is graft thrombosis, and adequate preventive and treatment strategies are unclear. To overcome these disadvantages, we suggest a modified surgical technique. MATERIAL AND METHODS Eleven patients underwent pancreas transplant with our modified technique...
January 19, 2017: Annals of Transplantation: Quarterly of the Polish Transplantation Society
https://www.readbyqxmd.com/read/28100019/a-randomized-trial-to-assess-whether-portal-pressure-guided-therapy-to-prevent-variceal-rebleeding-improves-survival-in-cirrhosis
#7
Càndid Villanueva, Isabel Graupera, Carles Aracil, Edilmar Alvarado, Josep Miñana, Ángela Puente, Virginia Hernandez-Gea, Alba Ardevol, Oana Pavel, Alan Colomo, Mar Concepción, María Poca, Xavier Torras, Josep M A Reñe, Carlos Guarner
: Monitoring the hemodynamic response of portal pressure to drug therapy accurately stratifies the risk of variceal rebleeding. We assessed whether guiding therapy with HVPG-monitoring may improve survival in the prevention of variceal rebleeding. Cirrhotic patients with controlled variceal bleeding were randomized to a HVPG-guided-therapy group (N= 84) or to a control group (N= 86). In both groups, HVPG and acute β-blocker response were evaluated at baseline and HVPG measurements were repeated at 2-4-weeks to determine chronic response...
January 18, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28099882/the-35-year-odyssey-of-beta-blockers-in-cirrhosis-any-gender-difference-in-sight
#8
REVIEW
Maria Antonella Burza, Hanns-Ulrich Marschall, Laura Napoleone, Antonio Molinaro
Cirrhosis is the end-stage of chronic liver disease and leads to the development of portal hypertension and its complications such as esophagogastric varices. Non-selective beta blockers (NSBB) are the keystone for the treatment of portal hypertension since the 1980s and, over the decades, several studies have confirmed their beneficial effect on the prevention of variceal (re)bleeding. Pharmacological studies showed effects of gender, sex hormones, oral contraceptives, and pregnancy on cytochrome P450 (CYPs) enzymes that metabolise NSBB, suggesting that gender differences might exist in the effect of NSBB...
January 15, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28099341/laparoscopic-distal-splenoadrenal-shunt-for-the-treatment-of-portal-hypertension-in-children-with-congenital-hepatic-fibrosis-a-case-report
#9
Jin-Shan Zhang, Wei Cheng, Long Li
BACKGROUND: The distal splenorenal shunt is an effective procedure for the treatment of portal hypertension in children. However, there has been no report about laparoscopic distal splenorenal shunt in the treatment of portal hypertension in children. METHODS: From December 2015 to August 2016, 4 children with upper gastrointestinal bleeding underwent laparoscopic distal splenoadrenal shunt. Portal hypertension and splenomegaly were demonstrated on the preoperative computed tomography (CT) and sonography...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28099224/comparison-of-model-based-iterative-reconstruction-adaptive-statistical-iterative-reconstruction-and-filtered-back-projection-for-detecting-hepatic-metastases-on-submillisievert-low-dose-computed-tomography
#10
Jung Hee Son, Seung Ho Kim, Jung-Hee Yoon, Yedaun Lee, Yun-Jung Lim, Seon-Jeong Kim
OBJECTIVE: The aim of the study was to compare the diagnostic performance of model-based iterative reconstruction (MBIR), adaptive statistical iterative reconstruction (ASIR), and filtered back projection (FBP) on submillisievert low-dose computed tomography (LDCT) for detecting hepatic metastases. METHODS: Thirty-eight patients having hepatic metastases underwent abdomen CT. Computed tomography protocol consisted of routine standard-dose portal venous phase scan (120 kVp) and 90-second delayed low-dose scan (80 kVp)...
January 18, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28099108/integration-of-contrast-enhanced-us-into-a-multimodality-approach-to-imaging-of-nodules-in-a-cirrhotic-liver-how-i-do-it
#11
Patricia C Jo, Hyun-Jung Jang, Peter N Burns, Kelly W Burak, Tae Kyoung Kim, Stephanie R Wilson
Accurate characterization of cirrhotic nodules and early diagnosis of hepatocellular carcinoma (HCC) are of vital importance. Currently, computed tomography (CT) and magnetic resonance (MR) imaging are standard modalities for the investigation of new nodules found at surveillance ultrasonography (US). This article describes the successful integration of contrast material-enhanced US into a multimodality approach for diagnosis of HCC and its benefits in this population. The application of contrast-enhanced US immediately following surveillance US allows for prompt dynamic contrast-enhanced evaluation, removing the need for further imaging of benign lesions...
February 2017: Radiology
https://www.readbyqxmd.com/read/28098057/totally-implantable-catheter-migration-and-its-percutaneous-retrieval-case-report-and-review-of-the-literature
#12
E Intagliata, F Basile, R Vecchio
Totally subcutaneous intravascular portals have been increasingly used to administer long-term chemotherapy and parental nutrition. The reported complications are rare. Accidental endovascular rupture of a fragment of catheter is one of the most formidable complications of the central vein catheterization. The Authors report a case of deployment of a Port-a-Cath catheter and its percutaneous retrieval. The catheter accidentally detached and migrated from the reservoir of the port-a-cath placed in the left subclavian vein to the right heart cavities through the blood stream...
September 2017: Il Giornale di Chirurgia
https://www.readbyqxmd.com/read/28097681/thromboelastography-in-dogs-with-chronic-hepatopathies
#13
W Fry, C Lester, N M Etedali, S Shaw, A DeLaforcade, C R L Webster
BACKGROUND: The coagulation status of dogs with liver disease is difficult to predict using conventional coagulation testing. HYPOTHESIS/OBJECTIVES: To evaluate thromboelastography (TEG) results and associations with conventional coagulation results and indicators of disease severity and prognosis in dogs with chronic hepatopathies (CH). ANIMALS: Twenty-one client-owned dogs. METHODS: Dogs with CH were prospectively (10 dogs) and retrospectively (11 dogs) enrolled from 2008 to 2014...
January 18, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28097107/surgical-resection-of-localized-hepatocellular-carcinoma-patient-selection-and-special-consideration
#14
REVIEW
Ka Wing Ma, Tan To Cheung
Localized hepatocellular carcinoma (HCC) refers to a solitary or few tumors located within either the left or right hemiliver without evidence of bilobar or extrahepatic spread. This term encompasses a heterogeneous morphology with no regard to stage of prognosis of the disease. Surgical resection remains the mainstay of curative treatment for the localized HCC. Various biochemical and radiological tests constitute an indispensible part of preoperative assessment. Emergence of laparoscopic hepatectomy has brought liver resection into a new era...
2017: Journal of Hepatocellular Carcinoma
https://www.readbyqxmd.com/read/28096543/therapy-experimental-portal-hypertension-pinning-hopes-on-fxr-agonists
#15
Katrina Ray
No abstract text is available yet for this article.
January 18, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28096076/a-landscape-of-synthetic-viable-interactions-in-cancer
#16
Yunyan Gu, Ruiping Wang, Yue Han, Wenbin Zhou, Zhangxiang Zhao, Tingting Chen, Yuanyuan Zhang, Fuduan Peng, Haihai Liang, Lishuang Qi, Wenyuan Zhao, Da Yang, Zheng Guo
Synthetic viability, which is defined as the combination of gene alterations that can rescue the lethal effects of a single gene alteration, may represent a mechanism by which cancer cells resist targeted drugs. Approaches to detect synthetic viable (SV) interactions in cancer genome to investigate drug resistance are still scarce. Here, we present a computational method to detect synthetic viability-induced drug resistance (SVDR) by integrating the multidimensional data sets, including copy number alteration, whole-exome mutation, expression profile and clinical data...
January 17, 2017: Briefings in Bioinformatics
https://www.readbyqxmd.com/read/28093626/contrast-enhanced-ct-in-determining-resectability-in-patients-with-pancreatic-carcinoma-a-meta-analysis-of-the-positive-predictive-values-of-ct
#17
Inne Somers, Shandra Bipat
OBJECTIVE: To obtain a summary positive predictive value (sPPV) of contrast-enhanced CT in determining resectability. METHODS: The MEDLINE and EMBASE databases from JAN2005 to DEC2015 were searched and checked for inclusion criteria. Data on study design, patient characteristics, imaging techniques, image evaluation, reference standard, time interval between CT and reference standard, and data on resectability/unresectablity were extracted by two reviewers. We used a fixed-effects or random-effects approach to obtain sPPV for resectability...
January 16, 2017: European Radiology
https://www.readbyqxmd.com/read/28093571/roux-en-y-gastric-bypass-increases-systemic-but-not-portal-bile-acid-concentrations-by-decreasing-hepatic-bile-acid-uptake-in-minipigs
#18
O Chávez-Talavera, G Baud, V Spinelli, M Daoudi, M Kouach, J-F Goossens, E Vallez, R Caiazzo, M Ghunaim, T Hubert, S Lestavel, A Tailleux, B Staels, F Pattou
Roux-en-Y gastric bypass (RYGB) surgery is widely used in the management of morbid obesity. RYGB improves metabolism independently of weight loss by still unknown mechanisms. Bile acids (BAs) are good candidates to explain this benefit, since they regulate metabolic homeostasis and their systemic concentrations increase upon RYGB. Here we analyzed the mechanisms underlying the increase in systemic BA concentrations after RYGB and the role of the liver therein. To this aim, we used the Göttingen-like minipig, a human-size mammalian model, which allows continuous sampling and simultaneous analysis of pre-hepatic portal and systemic venous blood...
January 17, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28092913/umbilical-venous-catheter-malposition-is-associated-with-necrotizing-enterocolitis-in-premature-infants
#19
Mustafa Sulemanji, Khashayar Vakili, David Zurakowski, Wayne Tworetzky, Steven J Fishman, Heung Bae Kim
OBJECTIVE: The etiology of necrotizing enterocolitis (NEC) remains elusive despite known associations with several factors, including intestinal ischemia related to the effects of umbilical arterial catheterization on the mesenteric circulation. However, the role of the mesenteric venous circulation has yet to be studied as a potential cause of NEC. We examined the association between umbilical venous catheter (UVC) position and the development of NEC in premature infants. DESIGN: A prospective cohort study was performed to examine the effect of UVC on portosystemic shunting via the ductus venosus (DV) and its potential role in NEC...
January 17, 2017: Neonatology
https://www.readbyqxmd.com/read/28092495/nonhypervascular-pancreatic-neuroendocrine-tumors-differential-diagnosis-from-pancreatic-ductal-adenocarcinomas-at-mr-imaging-retrospective-cross-sectional-study
#20
Sun Kyung Jeon, Jeong Min Lee, Ijin Joo, Eun Sun Lee, Hyun Jeong Park, Jin-Young Jang, Ji Kon Ryu, Kyung Bun Lee, Joon Koo Han
Purpose To determine useful magnetic resonance (MR) imaging features to differentiate nonhypervascular pancreatic neuroendocrine tumors (PNETs) from pancreatic ductal adenocarcinomas (PDACs). Materials and Methods The institutional review board approved this retrospective study and waived the informed consent requirement. Seventy-four patients with surgically confirmed PNETs and 82 patients with PDACs who underwent gadobutrol-enhanced MR imaging were included. Two radiologists independently evaluated the morphologic characteristics and temporal enhancement patterns of each tumor...
January 13, 2017: Radiology
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