Publications by authors named "Nyckowski P"

<b><br>Introduction:</b> Colorectal cancer (CRC) is the second-leading cause of cancer-related deaths worldwide. Distant metastases are usually located in the liver and are present in 50% of patients.</br> <b><br>Aim:</b> The aim of this study is to evaluate changes in body composition and phase angle before and after surgical treatment of CRC liver metastases, as well as survival time and treatment costs.

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<b> Introduction:</b> Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related death worldwide. Tumor penetration into the inferior vena cava/right atrium is rare, as it occurs only in 34% of HCC patients. There are no clear guidelines for the management of this stage of disease.

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PEComa (perivascular epithelioid cell tumor) is a rare liver tumor. Decisions regarding patient management are currently based on a few small case series. The aim of this study was to report the clinicopathological features of PEComa in order to provide guidance for management, complemented by our own experience.

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Purpose: Treatment response following transarterial chemoembolization (TACE) is frequently evaluated with Liver Imaging Reporting and Data System Treatment Response (LR-TR) algorithm, but its association with patients' outcomes is not supported in the literature. The purpose of this study was to provide such data.

Methods: A retrospective analysis of 99 TACE patients with stage A/B hepatocellular carcinoma according to Barcelona-Clinic Liver Cancer staging system was performed.

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Introduction: The metabolism of the body is a complicated process. The most important organ of the organism that affects the intensity of changes is the liver. An effective treatment method of primary and metastatic tumours is a partial resection of the organ.

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Introduction: Resection is an optimal way of treatment of hepatic tumors and metastasis from another organ. The operational injury may influence on patients body composition examined by bioelectrical impedance (BIA). Analysis of parameters may be helpful in identifying early changes indicating of deterioration in nutritional status.

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Pancreatic fistula is one of the most severe complications after pancreatic surgeries. The risk of pancreatic fistula after distal pancreatectomy is up to 60%. Effective methods to prevent pancreatic fistula are still sought.

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Objectives: Data on the relevance of surgeon experience in liver transplant procedures are scarce. In this study, we evaluated the effects of individual surgeon experience on survival outcomes after deceased-donor liver transplant.

Materials And Methods: In this retrospective analysis of 1193 liver transplant procedures, quantile regression for survival data was performed to assess the effects of surgeon experience.

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Liver retransplant is the last and only treatment for patients with irreversible graft failure. It is recognized as a high-risk procedure; thus surgical difficulties are multiplied with every successive liver transplant. Liver retransplant is a demanding technical procedure for the surgeon, with no guarantee of postoperative and long-term survival.

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Unlabelled: Liver transplantation is a well-established treatment of patients with end-stage liver disease and selected liver tumors. Remarkable progress has been made over the last years concerning nearly all of its aspects. The aim of this study was to evaluate the evolution of long-term outcomes after liver transplantations performed in the Department of General, Transplant and Liver Surgery (Medical University of Warsaw).

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Background: Budd-Chiari syndrome is a heterogeneous disease. The role of liver transplantation as a treatment option has been discussed since 1976. Many cases are related to underlying myeloproliferative neoplasms associated with prothrombotic propensity.

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Background: Acute renal failure (ARF) is one of the most significant complications of orthotopic liver transplantation (OLT), associated with increased mortality rate and the development of chronic renal dysfunction. The aim of the study was to determine the perioperative risk factors for ARF in patients without previous history of renal disease who are undergoing OLT.

Materials And Methods: Forty-six patients who developed ARF after OLT performed in 1 transplant center were included in the study, and 52 consecutive patients without that complication served as a control group.

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Background: Long-term complete remissions remain a rare exception in patients with metastatic gastrointestinal stromal tumors (GIST) treated with IM (imatinib). To date the therapeutic relevance of surgical resection of metastatic disease remains unknown except for the use in palliative intent.

Patients And Methods: We analyzed overall survival (OS) and progression-free survival (PFS) in consecutive patients with metastatic GIST who underwent metastasectomy and received IM therapy (n = 239).

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Background: Preoperative imatinib therapy of locally advanced GIST may facilitate resection and decrease morbidity of the procedure.

Methods: We have pooled databases from 10 EORTC STBSG sarcoma centers and analyzed disease-free survival (DFS) and disease-specific survival (DSS) in 161 patients with locally advanced, nonmetastatic GISTs who received neoadjuvant imatinib. OS was calculated from start of imatinib therapy for locally advanced disease until death or last follow-up (FU) after resection of the GIST.

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Introduction: Cirrhosis related to hepatitis C virus (HCV) and hepatitis B virus (HBV) infection is the most frequent indication for liver transplantation worldwide. Progress in prophylaxis of posttransplant HBV recurrence has led to major improvements in long-term outcomes of patients after liver transplantation. Conversely, impaired posttransplant survival of patients with HCV infection was reported in several studies, mainly due to recurrence of viral infection.

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Despite the long-standing history of transplantation, the shortage of organs has remained its most restrictive factor. In 2010, the number of actual deceased organ donors in Poland was 13.5/million population (pmp).

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The Aim Of The Study: was to analyze indications and results of the first one thousand liver transplantations at Chair and Clinic of General, Transplantation and Liver Surgery, Medical University of Warsaw.

Material And Methods: Data from 1000 transplantations (944 patients) performed at Chair and Clinic of General, Transplantation and Liver Surgery between 1994 and 2011 were analyzed retrospectively. These included 943 first transplantations and 55 retransplantations and 2 re-retransplantations.

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Background/aims: According to the data of the European Liver Transplant Registry (ELTR), liver transplantations (LTx) as a result of bile duct diseases were reported in 12.0% of cases. The aim of this study was to overview retrospective indications for operation and results of patients who underwent LTx for cholestatic diseases.

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Background: Hepatic artery thrombosis (HAT) remains an important cause of graft loss after liver transplantation. HAT can be caused by technical, hemodynamic, or immunologic factors. Bench reconstruction of anatomical variants of the hepatic artery is considered to fore a major risk related to HAT.

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Background: The prognosis of patients with primary sclerosing cholangitis (PSC) can be accurately determined using the Mayo Clinic Score (MRS), a mathematical model which predicts patient survival. The purpose of our study was to determine the risk of graft loss and/or death among patients who were listed or transplanted because of PSC.

Patients And Methods: We analyzed the data of 52 patients, who were placed on the transplant list due to PSC between January 2000 and November 2008 and either did or did not undergo liver transplantation (OLT).

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Background: TIPS, as non-operative treatment of portal hypertension allows for safe awaiting liver transplantation for patients otherwise at high risk of hemorrhage from oesophageal varices veins. When endoscopic treatment fails, TIPS is a plausible and less hazardous alternative for surgical porto-systemic shunts. It is of particular importance in patients with liver failure and unacceptable operative risk (group C in Child-Pugh classification).

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Background: Patients undergoing liver transplantation (ltx) for hepatitis B-related liver disease are prone to recurrence. Historically, ltx has been associated with aggressive reinfection and poor survival results. The mainstay of prophylaxis has been passive immunotherapy with hepatitis B immune globulin(HBIG).

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Unlabelled: Biliary complications are known as a weak point of liver transplantation. Their occurrence can be related to the practice of draining the biliary anastomosis performed at the time of transplantation. At our institution, routine of anastomotic biliary drainage was abandoned in June 2004.

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Background: The development of accurate diagnostic methods in gastrointestinal stromal tumors (GISTs) and the introduction of imatinib (IM) therapy has focused attention on the factors influencing the prognosis of patients with primary lesions as well as of patients with advanced disease treated with imatinib.

Material/methods: The clinico-pathological and genetic factors influencing disease-free survival (DFS) in 335 patients with primary CD117-immunopositive tumors (group A; calculated from primary tumor resection) and progression-free survival (PFS) in 232 metastatic/unresectable GIST patients treated with IM (group B; calculated from the start of imatinib therapy) were analyzed.

Results: In group A, statistically significant factors negatively influencing DFS(five-year DFS: 38%), both in univariate and multivariate analysis, were: primary tumor size >5 cm, mitotic index >5/50 HPF (high-power fields), male gender, primary tumor R1 resection or tumor rupture, non-gastric primary tumor localization.

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Background: Liver transplantation (LTx) for hepatocellular carcinoma (HCC) in cirrhotic liver is nowadays generally accepted treatment modality.

Aim Of Study: Overview of the indications and results of the LTx in the patients with HCC, the first one performed in 2001.

Material/methods: Among 357 adult liver transplant recipients in the period 1994-04.

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