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1.
World J Gastrointest Surg ; 14(9): 877-886, 2022 Sep 27.
Article in English | MEDLINE | ID: mdl-36185562

ABSTRACT

Colorectal cancer represents the third most diagnosed malignancy in the world. The liver is the main site of metastatic disease, affected in 30% of patients with newly diagnosed disease. Complete resection is considered the only potentially curative treatment for colorectal liver metastasis (CRLM), with a 5-year survival rate ranging from 35% to 58%. However, up to 80% of patients have initially unresectable disease, due to extrahepatic disease or bilobar multiple liver nodules. The availability of increasingly effective systemic chemotherapy has contributed to converting patients with initially unresectable liver metastases to resectable disease, improving long-term outcomes, and accessing tumor biology. In recent years, response to preoperative systemic chemotherapy before liver resection has been established as a major prognostic factor. Some studies have demonstrated that patients with regression of hepatic metastases while on chemotherapy have improved outcomes when compared to patients with stabilization or progression of the disease. Even if disease progression during chemotherapy represents an independent negative prognostic factor, some patients may still benefit from surgery, given the role of this modality as the main treatment with curative intent for patients with CRLM. In selected cases, based on size, the number of lesions, and tumor markers, surgery may be offered despite the less favorable prognosis and as an option for non-chemo responders.

2.
Transplant Proc ; 52(5): 1376-1379, 2020 Jun.
Article in English | MEDLINE | ID: mdl-32213293

ABSTRACT

BACKGROUND: Pancreas transplant is an effective treatment for insulin-dependent diabetic individuals with end-stage renal disease, yet immunosuppression-associated adverse events may adversely affect patient and graft survival. The aim of the study was to document whether mammalian target of rapamycin inhibitors (mTORi) are safe and effective as a second-line drug after pancreas transplant. METHODOLOGY: An observational single-center study was performed in a cohort of 490 simultaneous pancreas-kidney transplant and 45 pancreas-after-kidney transplant individuals after conversion to mTORi (n = 13) owing to adverse events of either tacrolimus or mycophenolate. RESULTS: mTORi conversion was performed 11.5 ± 10.1 (range, 1-28) months after pancreas transplant, mainly owing to cytomegalovirus infection and gastrointestinal intolerance. We frequently observed clinical complications after mTORi conversion, yet creatinine, eGFR, proteinuria, fasting plasma glucose, HbA1c, and C-peptide remained stable throughout the study (mean follow-up 8.2 ± 5, range 1-17) years, as did the lipid profile (P > .05). However, graft loss occurred in almost 20% of patients owing to chronic alterations. LIMITATIONS: The small number of patients and a single-center cohort were limitations of the study. CONCLUSIONS: Late mTORi conversion is a safe and effective approach when tacrolimus or mycophenolate-mediated adverse events occur after pancreas transplant.


Subject(s)
Everolimus/therapeutic use , Immunosuppressive Agents/therapeutic use , Pancreas Transplantation/methods , Sirolimus/therapeutic use , Adult , Drug Substitution/methods , Female , Graft Rejection/prevention & control , Graft Survival/drug effects , Humans , Immunosuppression Therapy/methods , Kidney Transplantation , Male , Middle Aged , Retrospective Studies , Treatment Outcome
3.
J Surg Oncol ; 121(5): 863-872, 2020 Apr.
Article in English | MEDLINE | ID: mdl-31902142

ABSTRACT

Despite the fact laparoscopic liver resections (LLR) for cholangiocarcinoma is still limited, this systematic review addressed surgical and oncological outcomes of LLR to treat both perihilar cholangiocarcinoma (pCCA) and intrahepatic cholangiocarcinoma (iCCA). Five comparative and 20 noncomparative studies were found. Regarding iCCA, LLR had lower blood loss and less need for Pringle maneuver. However, open liver resections (OLR) were performed more for major hepatectomies, with better lymphadenectomy rates and higher number of harvested lymph nodes. High heterogeneity and selection bias were suggested for iCCA studies.


Subject(s)
Bile Duct Neoplasms/surgery , Cholangiocarcinoma/surgery , Hepatectomy/methods , Laparoscopy , Blood Loss, Surgical , Humans , Lymph Node Excision
4.
World J Gastrointest Surg ; 11(2): 34-40, 2019 Feb 27.
Article in English | MEDLINE | ID: mdl-30842810

ABSTRACT

Liver surgery for the treatment of colorectal liver metastases is the standard treatment in a dynamic surgical field with many variables that should be considered in a curative intent scenario. Hepatectomy for colorectal liver metastases has undergone constant changes over the last 30 years, including indications until the need for rescue procedures of recurrent and advanced diseases as well as minimally invasive surgery. These advancements in liver surgery have not only resulted from overall improvements in the surgical field but have also resulted from a better understanding of the biological behavior of the disease, liver regeneration, and homeostasis during and after surgery. Improvements in anesthesiology, intensive care medicine, radiology, and surgical devices have correlated with further advancements of hepatectomies. Moreover, changes are still forthcoming, and both fields of augmented reality and artificial intelligence will likely have future contributions in this field in regard to both diagnoses and the planning of procedures. The aim of this editorial is to emphasize several aspects that have contributed to the paradigm shifts in colorectal liver metastases surgery over the last three decades as well as to discuss the factors concerning patient selection and the technical aspects of liver surgery. Finally, this editorial will highlight the promising new features of this surgery for diagnoses and treatments in this field.

5.
Hepatogastroenterology ; 62(138): 341-5, 2015.
Article in English | MEDLINE | ID: mdl-25916060

ABSTRACT

BACKGROUND/AIMS: To externally validate the predictive mathematical model of survival designed by Linhares et al. (2006). METHODOLOGY: This retrospective study was conducted on 217 individuals submitted to liver retransplantation from January 2000 to December 2008 in four European centers. The following variables were obtained on the recipient: age, creatinine, urgency of retransplantation and time between transplantation and retransplantation. The Kaplan-Meier survival curve and ROC curve were used to validate the mathematical model. RESULTS: The present results showed a similar pattern of survival compared to the study of Linhares et al. (2006) concerning the biological variations, when survival curves were compared for each of the four variables analyzed between both samples. When compared, the areas below the ROC curve (aROC) of derivation (0.733) and validation samples (0.593) presented significant difference (p = 0.005), revealing low relationship of sensitivity and specificity between the two curves. Similarity was observed in Kaplan-Meier survival curves. CONCLUSION: This study allowed external validation by the Kaplan-Meier survival curves of the predictive mathematical model of survival in liver retransplantation proposed by Linhares et al. (2006). However, validation through the ROC curve, the aROC, evidenced weak discrimination ability.


Subject(s)
Decision Support Techniques , Liver Transplantation/adverse effects , Adult , Age Factors , Area Under Curve , Biomarkers/blood , Creatinine/blood , Elective Surgical Procedures , Emergencies , Europe , Female , Humans , Kaplan-Meier Estimate , Liver Transplantation/methods , Liver Transplantation/mortality , Male , Patient Selection , Predictive Value of Tests , ROC Curve , Reoperation , Retrospective Studies , Risk Factors , Time Factors , Treatment Outcome
6.
Int J Clin Exp Pathol ; 7(1): 255-63, 2014.
Article in English | MEDLINE | ID: mdl-24427346

ABSTRACT

BACKGROUND: Our objective was to examine how the gene expression profile of tumor tissue correlates with lymph node metastasis in patients with advanced colorectal adenocarcinoma (CRAC). METHODS: We studied 36 patients (20 men and 16 women, 22-90 years of age) treated for CRAC (classifications of T2, T3, or T4; histological grade of G1 or G2). Amplified tumor mRNA samples were exposed to 20,000 human sequence probes and digitized images of the hybridized samples were analyzed. RESULTS: On average, 2389 probes were detected above the background, with an average correlation R value of 0.19 between data from different patient groups (with or without lymph node invasion, colon or rectal, with or without angio-lymphatic invasion, with or without recurrence). Lymph node metastasis had a statistically significant signature according to Significance Analysis of Microarrays (SAM) and parametric t-tests, with a false discovery rate (FDR)=0.1% and p=0.001, respectively. Cross-correlation of these two tests identified 102 transcripts as being potentially related to node metastases, with fold changes in the range of 2.182-12.960. CONCLUSION: We identified 102 differentially expressed genes related to the presence of lymph node metastases in patients with advanced colorectal cancer.


Subject(s)
Adenocarcinoma/genetics , Colorectal Neoplasms/genetics , Gene Expression Profiling/methods , Lymphatic Metastasis/genetics , Oligonucleotide Array Sequence Analysis/methods , Adenocarcinoma/pathology , Adult , Aged , Aged, 80 and over , Colorectal Neoplasms/pathology , Female , Humans , Lymphatic Metastasis/pathology , Male , Middle Aged , Young Adult
7.
Transplantation ; 94(6): 642-5, 2012 Sep 27.
Article in English | MEDLINE | ID: mdl-22929593

ABSTRACT

BACKGROUND: Immunosuppressive regimen is associated with several metabolic adverse effects. Bone loss and fractures are frequent after transplantation and involve multifactorial mechanisms. METHODS: A retrospective analysis of 130 patients submitted to simultaneous pancreas-kidney transplantation (SPKT) and an identification of risk factors involved in de novo Charcot neuroarthropathy by multivariate analysis were used; P<0.05 was considered significant. RESULTS: Charcot neuroarthropathy was diagnosed in 4.6% of SPKT recipients during the first year. Cumulative glucocorticoid doses (daily dose plus methylprednisolone pulse) during the first 6 months both adjusted to body weight (>78 mg/kg) and not adjusted to body weight were associated with Charcot neuroarthropathy (P=0.001 and P<0.0001, respectively). Age, gender, race, time on dialysis, time of diabetes history, and posttransplantation hyperparathyroidism were not related to Charcot neuroarthropathy after SPKT. CONCLUSIONS: Glucocorticoids are the main risk factors for de novo Charcot neuroarthropathy after SPKT. Protocols including glucocorticoid avoidance or minimization should be considered.


Subject(s)
Arthropathy, Neurogenic/etiology , Diabetes Mellitus, Type 1/surgery , Glucocorticoids/adverse effects , Immunosuppressive Agents/adverse effects , Kidney Transplantation/adverse effects , Pancreas Transplantation/adverse effects , Arthropathy, Neurogenic/diagnosis , Dose-Response Relationship, Drug , Female , Foot Joints/diagnostic imaging , Foot Joints/pathology , Graft Rejection/immunology , Graft Rejection/prevention & control , Humans , Magnetic Resonance Imaging , Male , Radiography , Retrospective Studies , Risk Assessment , Risk Factors , Time Factors , Treatment Outcome
8.
Surg Endosc ; 26(11): 3232-44, 2012 Nov.
Article in English | MEDLINE | ID: mdl-22729703

ABSTRACT

BACKGROUND: The aim of this study was to evaluate the clinical and inflammatory responses to surgical trauma caused by the natural orifice transluminal endoscopic surgery (NOTES) transvaginal endoscopic procedure compared with those of the laparoscopic route. METHODS: Twenty-one female swine were divided into three groups of seven animals and subjected to cholecystectomy using laparoscopic, laparotomic, and exclusively NOTES transvaginal routes. A group of five animals served as a control. The animals were monitored during surgery to evaluate anesthetic/surgical time and the presence of complications, which were evaluated after surgery with respect to roaming time, feeding, and the presence of clinical occurrence Measurements of TNF-α, IL-1ß, IL-6, CRP, IFN-γ were obtained before and after surgery, on the second and seventh postoperative days, and when the animals were killed and necropsied. RESULTS: All procedures were successfully completed as proposed in each group. Perioperative complications consisted of only gallbladder perforation and hepatic bleeding. The anesthetic/surgical time was longer in the NOTES vaginal group (p < 0.001). The postanesthetic recovery time, roaming, nutrition, and clinical evolution were similar in all groups. IL-1ß and IL-6 were undetectable in all groups. Levels of TNF-α, CRP, and IFN-γ were similar among the groups. However, the evolution of the inflammatory process, measured as the difference between the peak dose and the basal dose of IFN-γ, was lower in the NOTES group than in the laparotomy group. In the necropsy findings, only adhesions were found, with no difference among the groups. CONCLUSIONS: The entirely NOTES transvaginal cholecystectomy was feasible and safe. The surgical time was greater for the NOTES vaginal route. The inflammatory response was similar among the groups based on the levels of CRP and IFN-γ. However, the evolution of the inflammatory process seems to have been shorter in the vaginal NOTES group than in the laparotomy group as demonstrated by the difference between the peak and basal doses of IFN-γ.


Subject(s)
Cholecystectomy, Laparoscopic/adverse effects , Cholecystectomy/adverse effects , Cholecystectomy/methods , Cytokines/blood , Inflammation/etiology , Laparotomy/adverse effects , Natural Orifice Endoscopic Surgery/adverse effects , Animals , Female , Postoperative Complications/blood , Postoperative Complications/etiology , Swine , Vagina
9.
Hepatogastroenterology ; 59(116): 1230-3, 2012 Jun.
Article in English | MEDLINE | ID: mdl-22281972

ABSTRACT

BACKGROUND/AIMS: Because of the worse results from re-transplantation, a model for determining the long-term survival has been previously developed. Its effectiveness had to be tested and validated, as proposed in this study, using a different sample population than the one used to build it. METHODOLOGY: Age, recipient creatinine, urgency of re-transplantation, interval between primary liver transplant and re-transplantation (RETx) of 92 patients that received first liver RETx, from a different sample of patients, in a different time period than those used to develop the initial model. The proposed mathematical model was used to predict survival at six months after undergoing liver RETx. We compared the areas under the ROC curves (AROC) corresponding to the two independent samples (derivation and validation samples). By the log-rank technique, the survival curves were also compared and classified into tertiles according to the risk scores of the original model: high risk (>32), medium risk (24-32) and low risk (<24). RESULTS: Age, creatinine, time between primary liver transplant and re-transplantation and the urgency with which patients were enrolled, had comparable survival curves among the derivation and validation samples. When comparing the AROC of the derivation (0.733) and validation (0.741) samples, there was no statistically significant difference (p=0.915), therefore sensitivity and specificity ratios between the two are similar. CONCLUSIONS: This study made it possible to internally validate the original model for predicting survival at six months after undergoing liver RETx, although an external validation still needs to be done.


Subject(s)
Liver Transplantation/mortality , Adolescent , Adult , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Models, Theoretical , ROC Curve , Reoperation
10.
Exp Clin Transplant ; 8(1): 29-37, 2010 Mar.
Article in English | MEDLINE | ID: mdl-20199368

ABSTRACT

OBJECTIVES: We used homeostasis model assessment to investigate insulin sensitivity and secretion after a simultaneous pancreas-kidney transplant or kidney transplant alone. In that model, fasting plasma glucose and C-peptide levels are used to evaluate insulin sensitivity and beta-cell function. MATERIALS AND METHODS: Factors (eg, age, sex, race, delayed kidney allograft function) were correlated with homeostasis model assessment of beta-cell function and homeostasis model assessment of insulin sensitivity values after simultaneous pancreas-kidney transplant (n=89) or kidney transplant alone (n=68), and the results were compared with those in healthy subjects (n=49). RESULTS: Homeostasis model assessment of beta-cell function values were similar in patients who underwent kidney transplant alone or a simultaneous pancreas-kidney transplant, and were higher than homeostasis model assessment of beta cell function values in healthy subjects. The homeostasis model assessment of insulin sensitivity showed intermediate values for patients who underwent a simultaneous pancreas-kidney transplant and correlated with prednisone dosages (in those who underwent kidney transplant alone) and tacrolimus levels (in patients who underwent a simultaneous pancreas-kidney transplant). Homeostasis model assessment of beta-cell function values correlated with prednisone dosages in both groups and with tacrolimus levels in only those who underwent a simultaneous pancreas-kidney transplant. The body mass index of subjects who underwent kidney transplant alone correlated with both homeostasis model assessment of beta-cell function results and homeostasis model assessment of insulin sensitivity results. A family history of diabetes in subjects who underwent a simultaneous pancreas-kidney transplant correlated with homeostasis model assessment of beta-cell function results and homeostasis model assessment of insulin sensitivity results. CONCLUSIONS: Immunosuppressive regimen and body mass index were linked with reduced insulin sensitivity after kidney transplant. A family history of diabetes was linked with higher values of insulin secretion and lower insulin sensitivity in patients who underwent a simultaneous pancreas-kidney transplant.


Subject(s)
Diabetes Mellitus/genetics , Insulin Resistance/physiology , Insulin/metabolism , Kidney Transplantation/physiology , Pancreas Transplantation/physiology , Pedigree , Adult , Blood Glucose/metabolism , Body Mass Index , C-Peptide/blood , Case-Control Studies , Diabetes Mellitus/metabolism , Diabetes Mellitus/physiopathology , Female , Homeostasis/physiology , Humans , Immunosuppressive Agents/therapeutic use , Insulin Secretion , Insulin-Secreting Cells/physiology , Kidney Transplantation/immunology , Male , Models, Biological , Prednisone/therapeutic use , Tacrolimus/therapeutic use
11.
Diabetol Metab Syndr ; 1(1): 11, 2009 Sep 28.
Article in English | MEDLINE | ID: mdl-19825148

ABSTRACT

Pancreas transplantation is an invasive procedure that can restore and maintain normoglycemic level very successfully and for a prolonged period in DM1 patients. The procedure elevates the morbimortality rates in the first few months following the surgery if compared to kidney transplants with living donors, but it offers a better quality of life to patients.Although controversial, several studies have shown the stabilization or the improvement of some of the chronic complications related to diabetes, as well as the extra number of years of life that patients submitted to a double pancreas-kidney transplantation may gain.Recent studies have demonstrated clashing outcomes regarding isolated pancreas transplantations, a fact which reinforces the need for a more discerning selection of patients for this procedure.

12.
Diabetol Metab Syndr ; 1(1): 2, 2009 Aug 26.
Article in English | MEDLINE | ID: mdl-19825194

ABSTRACT

BACKGROUND: Diabetes is a disease of increasing worldwide prevalence and is the main cause of chronic renal failure. Type 1 diabetic patients with chronic renal failure have the following therapy options: kidney transplant from a living donor, pancreas after kidney transplant, simultaneous pancreas-kidney transplant, or awaiting a deceased donor kidney transplant. For type 2 diabetic patients, only kidney transplant from deceased or living donors are recommended. Patient survival after kidney transplant has been improving for all age ranges in comparison to the dialysis therapy. The main causes of mortality after transplant are cardiovascular and cerebrovascular events, infections and neoplasias. Five-year patient survival for type 2 diabetic patients is lower than the non-diabetics' because they are older and have higher body mass index on the occasion of the transplant and both pre- and posttransplant cardiovascular diseases prevalences. The increased postransplant cardiovascular mortality in these patients is attributed to the presence of well-known risk factors, such as insulin resistance, higher triglycerides values, lower HDL-cholesterol values, abnormalities in fibrinolysis and coagulation and endothelial dysfunction. In type 1 diabetic patients, simultaneous pancreas-kidney transplant is associated with lower prevalence of vascular diseases, including acute myocardial infarction, stroke and amputation in comparison to isolated kidney transplant and dialysis therapy. CONCLUSION: Type 1 and 2 diabetic patients present higher survival rates after transplant in comparison to the dialysis therapy, although the prevalence of cardiovascular events and infectious complications remain higher than in the general population.

13.
J. bras. nefrol ; 31(2): 78-88, abr.-jun. 2009. tab, ilus
Article in Portuguese | LILACS | ID: lil-595472

ABSTRACT

O transplante de pâncreas-rim (TSPR) é um dos tratamentos mais efetivos para o paciente com diabetes melito e insuficiência renal crônica. Métodos: Foram realizadas análises retrospectivas da sobrevida de 150 pacientes submetidos ao TSPR pela regressão de COX e determinação das curvas de Kaplan-Meier, além das análises uni - e multivariadas para identificação dos fatores de risco tradicionais e aqueles relacionados ao transplante. Resultados: As taxas de sobrevidas em um ano dos pacientes, dos enxertos renais e pancreáticos foram de 82,0%, 80,0% e 76,7%, respectivamente. Função retardada do enxerto renal (FRR) (P = 0,001, RR 5,41), rejeição aguda renal (P = 0,016, RR 3,36) e infecção intra-abdominal (IIA) (P < 0,0001, RR 4,15) foram os principais fatores de risco que influenciaram a sobrevida do paciente em um ano. A sobrevida do paciente em um ano esteve relacionada à ocorrência de FRR (P = 0,013, RC 3,39), à rejeição aguda renal (P = 0,001, RC 4,74) e à IIA (P = 0,003, RC 6,29). A sobrevida do enxerto pancreático em um ano esteve relacionada à IIA (P < 0,0001, RC 12,83), à trombose vascular (P = 0,002, RC 40,55), à rejeição aguda renal (P = 0,027, RC 3,06), ao sódio do doador > 155 mEq/L (P = 0,02, RC 3,27) e ao uso de dopamina > 7,6 µcg/kg/min (P = 0,046, RC 2,85). Discussão: A ocorrência de função retardada do enxerto renal e infecção intraabdominal teve impacto na sobrevida em um ano tanto do paciente quanto dos enxertos renal e pancreático


Simultaneous pancreas-kidney transplantation (SPKT) is one of the treatments for insulin-dependent patients with chronic renal failure. Methods: One-year patient and kidney allograft survival rates of 150 patients submitted to SPKT analyzed by COX regression and Kaplan-Meier. Uni- and multivariate analysis identified the risk factors involved with either allograft or patient survival. Results: One-year patient and kidney allograft survival rates were 82% and 80%, respectively. Delayed graft function from kidney (DGF) (P = 0.001, HR 5.41), acute kidney rejection (P = 0.016, HR 3.36) and intra-abdominal infection (IAI) (P < 0.0001, HR 4.15) were related to the 1-yr patient survival. One-year kidney allograft survival was also related to DGF (P = 0.013, OR 3.39), acute rejection (P = 0.001, OR 4.74) and IAI (P = 0.003, OR 6.29). Main risk factors for DGF: time on dialysis > 27 months (P = 0.046, OR 2.59), kidney cold ischemia time > 14 hours (P = 0.027, OR 2.94), donor age > 25 years (P = 0.03, OR 2.82) and donor serum sodium > 155 mEq/l (P < 0.0001, OR 1.09). Conclusions: Delayed kidney allograft function and IAI had an important impact on either patient or kidney allograft survival rates. Improving deceased donor care may reduce DGF occurrence.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Survival Analysis , Pancreas Transplantation/statistics & numerical data , Pancreas Transplantation/mortality , Pancreas Transplantation , Kidney Transplantation/statistics & numerical data , Kidney Transplantation/mortality , Kidney Transplantation
14.
Exp Clin Transplant ; 6(4): 301-6, 2008 Dec.
Article in English | MEDLINE | ID: mdl-19338493

ABSTRACT

OBJECTIVES: Simultaneous pancreatic-renal transplant is an effective treatment for insulin-dependent patients with chronic renal failure. We sought to identify the main influences on pancreatic and patient survival rates after simultaneous pancreas-kidney transplants. PATIENTS AND METHODS: The 1-year patient and pancreas survival rates of 150 patients who had undergone simultaneous pancreas-kidney transplant were analyzed by the Cox proportional hazards regression model and the Kaplan-Meier method. Uni and multivariate analyses were performed in terms of transplant-, recipient-, and donor-related risk factors. RESULTS: At 1 year, patient and pancreatic allograft survival rates were 82% and 76.7%, respectively. Delayed graft function in the kidney (P = .001, HR 5.41), acute kidney rejection (P = .016, HR 3.36), and intra-abdominal infection (P < .0001, HR 4.15) were the main factors related to 1-year patient survival. Pancreatic allograft survival at 1 year was related to intra-abdominal infection (P < .0001, OR 12.83), vascular thrombosis (P = .002, OR 40.55), acute kidney rejection (P = .027, OR 3.06), donor sodium greater than 155 mEq/L (P = .02, OR 3.27), and dopamine administration exceeding 7.6 microg/kg/min (P = .046, OR 2.85). CONCLUSIONS: Delayed kidney allograft function and intra-abdominal infection had an important effect on both patient and pancreatic allograft survival rates.


Subject(s)
Graft Survival , Kidney Transplantation/mortality , Kidney/physiopathology , Kidney/surgery , Pancreas Transplantation/mortality , Pancreas/physiopathology , Pancreas/surgery , Adolescent , Adult , Brazil/epidemiology , Communicable Diseases/mortality , Communicable Diseases/physiopathology , Delayed Graft Function/mortality , Delayed Graft Function/physiopathology , Dopamine/adverse effects , Female , Graft Rejection/mortality , Graft Rejection/physiopathology , Humans , Kaplan-Meier Estimate , Kidney Transplantation/adverse effects , Male , Middle Aged , Odds Ratio , Pancreas Transplantation/adverse effects , Proportional Hazards Models , Retrospective Studies , Risk Assessment , Risk Factors , Sodium/blood , Survival Analysis , Thrombosis/mortality , Thrombosis/physiopathology , Time Factors , Treatment Outcome , Young Adult
15.
Clin Transplant ; 21(2): 241-5, 2007.
Article in English | MEDLINE | ID: mdl-17425752

ABSTRACT

Thrombotic microangiopathy (TMA) is rare after transplantation and is associated with a high incidence of kidney graft dysfunction. Between December 2000 and March 2006, 136 simultaneous pancreas-kidney transplantations were performed with an incidence of TMA of 5.1% (71.4% localized to kidney allograft). All cases were diagnosed during the first three months and were attributed to tacrolimus; 74% were women. Systemic TMA presented higher values of lactate dehydrogenase (2658 +/- 659 U/L vs. 1331 +/- 473 U/L, p = 0.04) and a greater decrease in hematocrit (45.8 +/- 17.7% vs. 19.2 +/- 6%, p = 0.02) than in localized TMA. Acute kidney rejection complicated almost 90% of the cases with 43% of kidney graft lost. Tacrolimus was switched to sirolimus and fresh-frozen plasma was administered. Creatinine clearance after a mean follow-up of two yr was 100.7 mL/min/1.73 m(2) and 57.9 mL/min/1.73 m(2) in patients with systemic and localized TMA, respectively. In conclusion, sirolimus is an alternative to TMA associated with tacrolimus.


Subject(s)
Immunosuppressive Agents/adverse effects , Kidney Transplantation , Kidney/blood supply , Pancreas Transplantation , Postoperative Complications/chemically induced , Tacrolimus/adverse effects , Thrombosis/chemically induced , Adolescent , Adult , Capillaries/pathology , Humans , Kidney Glomerulus/blood supply , Kidney Glomerulus/pathology , Middle Aged , Retrospective Studies , Tacrolimus/therapeutic use
16.
Transplantation ; 81(7): 1016-21, 2006 Apr 15.
Article in English | MEDLINE | ID: mdl-16612278

ABSTRACT

BACKGROUND: Because of the worse results from retransplantation in relation to the initial liver transplantation, there is a need to refine the indication for retransplantation, such that fair distribution of this benefit is obtained. METHODS: This was a study of 139 patients who underwent liver retransplantation. Thirty variables were studied: 18 relating to the recipient and 12 to the donor. All the independent variables were initially compared with the length of survival using univariate analyses. Variables presenting significance were compared with the dependent variable of length of survival, to determine which factors were related to longer survival among patients, when evaluated together. RESULTS: A multivariate model for determining long-term survival among patients with retransplants was built up using the following variables: recipient's age, creatinine, urgency of retransplantation and early failure of the first graft. Through this multivariate model it was possible to determine a score that was categorized according to tertile distributions (below the 33rd percentile, score <24; 33rd to 66th percentile, 24 < or = score < or = 32; above the 66th percentile, score > 32). One-year, 3-year, and 5-year patient survival rates following retransplantation were respectively 85%, 82%, and 77% for scores <24; 69%, 66%, and 61% for scores between 24 and 32; and 21%, 19%, and 16% for scores >32 (P < 0.0001). CONCLUSION: The variables of recipient's age, creatinine, urgency of retransplantation, and early failure of the initial transplantation were factors that were independently related to the long-term survival of patients with liver retransplants.


Subject(s)
Liver Transplantation , Survival Analysis , Adolescent , Adult , Aged , Child , Child, Preschool , Female , Graft Survival , Humans , Infant , Male , Middle Aged , Reoperation , Retrospective Studies
17.
Surg Laparosc Endosc Percutan Tech ; 16(1): 1-3, 2006 Feb.
Article in English | MEDLINE | ID: mdl-16552369

ABSTRACT

Dieulafoy lesion is characterized by exteriorization of a large pulsatile arterial vessel through a minimal mucosal tear surrounded by normal mucosa, causing massive and recurrent upper digestive bleeding in previously healthy patients. More frequently presented than diagnosed, with the increase of its knowledge among endoscopists, a large number of cases are expected in the literature. Data from patients with upper gastrointestinal bleeding submitted to endoscopy at the Federal University of São Paulo, Gastrointestinal Endoscopy Unit from 1991 through 2002 were reviewed for Dieulafoy lesion. We found 15 patients with typical Dieulafoy gastric lesion. Their ages ranged from 18 to 78 years (mean age 49.9); 5 patients were female and 10 were male. Bleeding presented as hematemesis and melena in 7 cases (46.6%), hematemesis alone in 4 cases (26.6%), and melena alone in the other 4 cases (26.6%). Initial hemostatic approaches employed were: alcoholization (2 cases), epinephrine associated with alcohol injection (5 cases), sclerosis in 7 cases and surgery in 1 case. Dieulafoy lesion is a distinct nosologic entity that must be suspected in patients with massive digestive bleeding. Endoscopy became the procedure of choice for diagnosis and treatment of this disease.


Subject(s)
Digestive System Surgical Procedures , Gastrointestinal Hemorrhage/therapy , Gastroscopy , Stomach Ulcer/therapy , Adolescent , Adult , Aged , Alcohols/administration & dosage , Epinephrine/administration & dosage , Female , Gastrointestinal Hemorrhage/etiology , Hemostatic Techniques , Humans , Ligation , Male , Middle Aged , Sclerosing Solutions/administration & dosage , Stomach Ulcer/complications , Vasoconstrictor Agents/administration & dosage
18.
Transplantation ; 80(9): 1269-74, 2005 Nov 15.
Article in English | MEDLINE | ID: mdl-16314795

ABSTRACT

BACKGROUND: Belzer solution is considered to be the best preservation media used for pancreas transplantation; however, its high cost accounts for approximately 14.5% of all resources allocated by the Brazilian government toward each pancreatic transplant. The objective of the present study was to test a reduction of Belzer solution during pancreas harvest, thereby lowering procedural cost. METHODS: The patients received pancreas-kidney transplantations during the period from January 2003 to August 2004. Patients were divided into two groups. Patients assigned to Group A (n=30) received only Belzer solution (2 L through the aorta artery), whereas patients in Group B (n=16) were perfused first with 1 L of Eurocollins solution followed by 1 L of Belzer solution. The two groups were assessed for differences in the following clinical parameters: the need for insulin replacement or antifungal and anticytomegalovirus treatment, pancreatitis, acute cellular rejection, graft vascular thrombosis, fistulas, intra-abdominal collection, graft loss, deaths, pancreatic ischemia time, and average hospitalization time. RESULTS: No statistically significant differences were observed in any of the parameters analyzed (P<0.05). The use of Eurocollins solution, followed by Belzer solution during pancreas harvesting, did not result in differences in graft survival or functionality, postsurgical complications, or patient survival and hospitalization time, when compared to the use of Belzer solution alone. CONCLUSIONS: Perfusion with 1 L of Eurocollins solution followed by 1 L of Belzer solution during pancreas harvesting seems to be a simple and efficient alternative for reducing the costs of the harvesting process.


Subject(s)
Aorta , Hypertonic Solutions/standards , Organ Preservation Solutions/standards , Pancreas , Tissue and Organ Harvesting , Adenosine/economics , Adult , Allopurinol/economics , Cost Control , Drug Costs , Female , Glutathione/economics , Humans , Insulin/economics , Length of Stay , Male , Organ Preservation Solutions/economics , Pancreas/physiopathology , Pancreas Transplantation/adverse effects , Raffinose/economics , Survival Analysis , Therapeutic Irrigation , Tissue Survival , Tissue and Organ Harvesting/economics , Tissue and Organ Harvesting/methods
19.
Liver Transpl ; 11(11): 1439-43, 2005 Nov.
Article in English | MEDLINE | ID: mdl-16237713

ABSTRACT

Hydrothorax is a frequent finding in patients with end-stage liver disease. During the hepatectomy phase of liver transplantation, it is often needed to evacuate large pleural effusions. The acute expansion of the collapsed lung can cause reexpansion pulmonary edema with variable clinical significance. However, this complication has rarely been reported after liver transplantation. In conclusion, we report on an overwhelming reexpansion pulmonary edema during a liver transplantation that rapidly led to the patient's demise and speculate if this condition has not been under recognized in the transplantation setting.


Subject(s)
Intraoperative Complications/diagnosis , Liver Failure/surgery , Liver Transplantation/adverse effects , Pulmonary Edema/diagnosis , Disease Progression , Fatal Outcome , Humans , Intraoperative Complications/therapy , Liver Cirrhosis/diagnosis , Liver Cirrhosis/surgery , Liver Failure/diagnosis , Liver Transplantation/methods , Male , Middle Aged , Perioperative Care , Pulmonary Edema/therapy , Severity of Illness Index
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