Intraoperative metabolic changes associated with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy.

BACKGROUND: Cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC) causes considerable hemodynamic, respiratory, and metabolic changes during the perioperative period. OBJECTIVES: To evaluate metabolic changes associated with this procedure. Understanding perioperative factors and their association with morbidity may improve the perioperative management of patients undergoing this treatment. METHODS: A retrospective review of a prospectively maintained database was performed. All consecutive unselected patients who underwent CRS plus HIPEC between January 2018 and December 2020 (n = 219) were included. RESULTS: The mean age was 58 ± 11.7 years and 167 (76.3%) were female. The most frequent histology diagnosis was serous ovarian carcinoma 49.3% (n = 108) and colon carcinoma 36.1% (n = 79). Mean peritoneal cancer index was 14.07 ± 10.47. There were significant variations in pH, lactic acid, sodium, potassium, glycemia, bicarbonate, excess bases, and temperature (p < 0.05) between the pre-HIPEC and post-HIPEC periods. The closed HIPEC technique resulted in higher levels of temperature than the open technique (p < 0.05). Age, potassium level post-HIPEC potassium level, and pre-HIPEC glycemia were identified as prognostic factors for morbidity in multivariate analysis. CONCLUSION: The administration of HIPEC after CRS causes significant changes in internal homeostasis. Although the closed technique causes a greater increase in temperature, it is not related to higher morbidity rates. The patient's age, post-HIPEC potassium level, and pre-HIPEC glycemia are predictive factors for morbidity.

Laparoscopic cytoreductive surgery and HIPEC: a comparative matched analysis.

BACKGROUND: Cytoreductive surgery (CRS) plus hyperthermic intraperitoneal chemotherapy (HIPEC) is a procedure that has had encouraging results for peritoneal metastases (PM) from diverse tumour origins, but it is not exempt from high morbidity. Recently, the important role of laparoscopy in oncologic surgeries and its benefits have been evaluated for CRS + HIPEC in selected patients, which has yielded promising results. The aim of our study is to analyse the use of laparoscopy for CRS + HIPEC in patients with limited peritoneal disease. METHODS: We have conducted a retrospective study from a prospective database in our tertiary referral hospital within the period of January 2009 to July 2019, which includes 825 patients who had PM from varying tumour origins. We have compared the patients treated with the laparoscopic approach (L-CRS-HIPEC) to a matched population who have undergone the open approach (O-CRS-HIPEC) and fulfil the same selection criteria. We have analysed the postoperative outcomes and survival results. RESULTS: We have confirmed the homogeneity between the sample of the O-CRS + HIPEC (n = 42) and the L-CRS + HIPEC (n = 18) regarding preoperative and intraoperative features. The L-CRS + HIPEC group had shorter hospital stays, (median of 4 [2-10] days versus 9 [2-19] days) and reduced wait time to return to chemotherapy (median of 4 [3-7] weeks and a median of 8 [4-36] weeks) than the O-CRS + HIPEC group. No differences were found regarding the need for perioperative blood transfusion, surgery time or postoperative morbi-mortality. No early locoregional relapse occurred in the L-CRS + HIPEC group and short term disease-free survival did not differ between groups. CONCLUSIONS: Laparoscopy for CRS + HIPEC is feasible and safe in highly selected patients, with no significant differences concerning postoperative morbi-mortality or early oncological results. We have found that patients who have undergone laparoscopic operations have shorter hospital stays and that they return to adjuvant chemotherapy sooner. Further investigation is required to confirm the benefits of minimally invasive procedures for the management of PM.

Complete laparoscopic pelvic peritonectomy plus hyperthermic intraperitoneal chemotherapy.

BACKGROUND: The aim of our study was to present the technique for, and early results of complete laparoscopic pelvic peritonectomy (LPP) plus hyperthermic intraperitoneal chemotherapy (HIPEC). METHODS: We conducted a study on consecutive patients who had LPP for limited peritoneal carcinomatosis (peritoneal carcinomatosis index < 10) from ovarian cancer, colon cancer and benign multicystic mesothelioma, from January 2017 to November 2019 at 2 referral centers in Spain. Perioperative, pathologic, 30-day major morbidity and mortality characteristics were analyzed. The surgical technique is shown in the attached video. RESULTS: Twelve LPP + HIPEC were performed. Complete cytoreduction was achieved in 100% of the patients, the median duration of the operation was 450 min (range 360-600 min). There were 2 cases (16%) of IIIa morbidity (trocar hernia and pleural effusion), and no mortality. The median length of hospital stay was 5.5 days (range 4-10 days). The median length of follow-up was 10 months (range 2-30 months). There was a recurrence at the splenic hilum in 1 patient which was treated by laparoscopic splenectomy and one nodal recurrence at 13 months while all other patients are alive and free of disease at last follow-up. CONCLUSIONS: This is the first technical video of a minimally invasive approach for complete pelvic peritonectomy plus omentectomy associated with HIPEC. For highly selected patients, this procedure presents a feasible and safe alternative to the maximally invasive approach.

Predictores pretrasplante de mortalidad precoz en receptores adultos de trasplante hepático en la era MELD-Na / Pretransplant predictors of early mortality in adult recipients of liver transplantation in the MELD-Na Era

Objetivos: Identificar predictores pretrasplante de mortalidad precoz (90 días postrasplante) y evaluar su capacidad discriminante en receptores adultos de trasplante hepático (RTH). Diseño: Estudio observacional, retrospectivo, de casos y controles anidados sobre una cohorte consecutiva de RTH. Ámbito: Hospital Universitario. Pacientes: Desde enero de 2003 a diciembre de 2016, todos los receptores adultos de trasplante hepático fueron elegibles para inclusión. Fueron excluidos los RTH por fallo hepático agudo, disfunción de un injerto previo, trasplante simultáneo de órganos, de donantes en asistolia, y aquellos que precisaron retrasplante durante el periodo de estudio. Para el análisis se incluyeron 471 pacientes. Principales variables de interés: Las características pretrasplante fueron las variables de interés. Los RTH fueron agrupados de acuerdo con la variable dependiente (mortalidad precoz). Los predictores se obtuvieron mediante análisis multivariante de regresión logística. La capacidad discriminante de los modelos obtenidos se evaluó mediante comparación de curvas ROC. Resultados: Se identificaron como predictores independientes de mortalidad precoz: la puntuación MELD-Na (OR=1,069; IC95%=1,014-1,127), la edad mayor de 60 años (OR=2,479; IC95%= 1,226-5,015), y la estatura del RTH inferior a 163cm (OR=4,092; IC95%=2,115-7,917), considerándose el motivo del trasplante (carcinoma hepatocelular o cirrosis descompensada) como variable de confusión. Conclusiones: En los RTH por cirrosis descompensada, la puntuación MELD-Na, la edad mayor de 60 años y la estatura del receptor inferior a 163cm son predictores independientes de mortalidad precoz. Esos predictores producen un modelo que clasifica a los pacientes significativamente mejor que el MELD-Na en relación con la mortalidad precoz

Aims: To identify pretransplant predictors of early mortality (90 days after transplantation) and evaluate their discriminating capacity in adult liver transplant recipients (LTR). Design: An observational, retrospective, nested cases-controls study from a consecutive cohort of LTRs was carried out. Setting: University hospital. Patients: All consecutive LTR between January 2003 and December 2016 were eligible for inclusion. Patients with acute liver failure, previous graft dysfunction, simultaneous multiple organ transplantation, non-heart beating donors, and those needing urgent retransplantation during the study period were excluded. The analysis comprised 471 patients. Main variables of interest: Pretransplant characteristics were the main variables of interest. The LTR were grouped according to the dependent variable (early mortality). Multivariate logistic regression analysis was conducted to identify predictors of early mortality. The discriminating capacity of the models obtained was evaluated by comparing ROC curves (models versus MELD-Na). Results: The MELD-Na score (OR = 1.069, 95% CI = 1.014-1.127), age > 60 years (OR = 2.479, 95% CI = 1.226-5.015), and LTR height < 163cm (OR = 4.092, 95% CI = 2.115-7.917) were identified as independent predictors of early mortality. The cause of transplantation (hepatocellular carcinoma or decompensated cirrhosis) was identified as a confounding factor. Conclusions: In LTR due to decompensated cirrhosis, the MELD-Na score, age > 60 years, and height < 163cm are independent predictors of early mortality. These factors provide a better classification model than the MELD-Na score for early post-transplant mortality

"Super-rapid" Technique in Donation After Circulatory Death Liver Donors: Advantages and Disadvantages.

In recent years, donation after circulatory death (DCD) has increased as an option to overcome the organ donor shortage crisis and to decrease the large number of patients on liver transplant waiting lists. The "super-rapid" technique is now the "gold standard" procurement method because of its availability, reproducibility, low cost, and extensive experience. Recently, extracorporeal support has been implemented, with encouraging results. Strict donor acceptance criteria have proven to be essential to optimize the DCD liver graft outcomes and minimize biliary complication rates. In this study we assessed the state of the art of DCD liver transplantation with regard to its development and the actual strategies to prevent graft complications, with aim of expanding the pool of marginal liver donors.

Pretransplant predictors of early mortality in adult recipients of liver transplantation in the MELD-Na Era. / Predictores pretrasplante de mortalidad precoz en receptores adultos de trasplante hepático en la era MELD-Na.

AIMS: To identify pretransplant predictors of early mortality (90 days after transplantation) and evaluate their discriminating capacity in adult liver transplant recipients (LTR). DESIGN: An observational, retrospective, nested cases-controls study from a consecutive cohort of LTRs was carried out. SETTING: University hospital. PATIENTS: All consecutive LTR between January 2003 and December 2016 were eligible for inclusion. Patients with acute liver failure, previous graft dysfunction, simultaneous multiple organ transplantation, non-heart beating donors, and those needing urgent retransplantation during the study period were excluded. The analysis comprised 471 patients. MAIN VARIABLES OF INTEREST: Pretransplant characteristics were the main variables of interest. The LTR were grouped according to the dependent variable (early mortality). Multivariate logistic regression analysis was conducted to identify predictors of early mortality. The discriminating capacity of the models obtained was evaluated by comparing ROC curves (models versus MELD-Na). RESULTS: The MELD-Na score (OR = 1.069, 95% CI = 1.014-1.127), age > 60 years (OR = 2.479, 95% CI = 1.226-5.015), and LTR height < 163cm (OR = 4.092, 95% CI = 2.115-7.917) were identified as independent predictors of early mortality. The cause of transplantation (hepatocellular carcinoma or decompensated cirrhosis) was identified as a confounding factor. CONCLUSIONS: In LTR due to decompensated cirrhosis, the MELD-Na score, age > 60 years, and height < 163cm are independent predictors of early mortality. These factors provide a better classification model than the MELD-Na score for early post-transplant mortality.

Cytoreductive Surgery and Intraperitoneal Hyperthermic Chemotherapy (HIPEC) by Minimally Invasive Approach, an Initial Experience.

BACKGROUND: The cytoreductive surgery (CRS) associated with hyperthermic intraperitoneal chemotherapy (HIPEC) has become the standard treatment in patients with carcinomatosis peritoneal from different origins. The use of a minimally invasive approach for this high complex procedure might be an alternative that provides them less morbidity and faster recovery with similar oncologic outcomes. METHODS: We describe the initial experience of CRS and HIPEC done via the laparoscopic route in patients with minimal peritoneal metastases in our Unit from March 2016 to January 2018. RESULTS: A total of eight patients were operated by this minimally invasive approach. The different diagnoses were low-grade pseudomyxoma peritonei (2), benign multicystic mesothelioma (2), primary epithelial ovarian carcinomatosis (2) and locally advanced colon carcinoma T4 (2). The median age was 54 (20-62) years, the median PCI was 3 (2-4), the median operative time was 287 min (240-360), complete cytoreduction CC0 was achieved in all the patients, and no major morbidity was observed. The median length of stay was 4.75 days (4-5). After a median follow-up of 9.5 months, no relapse has been observed. CONCLUSION: The results suggest that this minimally invasive approach for CRS and HIPEC is feasible and safe in a highly selected group of patients with peritoneal surface malignancies.

What Is the Influence of Both Risk Donor and Risk Receiver on Simultaneous Pancreas-Kidney Transplantation?

INTRODUCTION: Some factors affect the pancreas of a marginal donor, and although their influence on graft survival has been determined, there is an increasing consensus to accept marginal organs in a controlled manner to increase the pool of organs. Certain factors related to the recipient have also been proposed as having negative influence on graft prognosis. The objective of this study was to analyze the influence of these factors on the results of our simultaneous pancreas-kidney (SPK) transplantation series. MATERIALS AND METHODS: Retrospective analysis of 126 SPK transplants. Donors and recipients were stratified in an optimal group (<2 expanded donor criteria) and a risk group (≥2 criteria). A pancreatic graft survival analysis was performed using a Kaplan-Meier test and log-rank test. Prognostic variables on graft survival were studied by Cox regression. Postoperative complications (graded by Clavien classification) were compared by χ2 test or Fisher test. RESULTS: Median survival of pancreas was 66 months, with no significant difference between groups (P > .05). Multivariate analysis showed risk factors to be donor age, cold ischemia time, donor body mass index, receipt body mass index, and receipt panel-reactive antibody. CONCLUSIONS: In our series, the use of pancreatic grafts from donors with expanded criteria is safe and has increased the pool of grafts. Different variables, both donor and recipient, influence the survival of the pancreatic graft and should be taken into account in organ distribution systems.

Intraoperative Heparinization During Simultaneous Pancreas-Kidney Transplantation: Is It Really Necessary?

INTRODUCTION: The use of intraoperative sodium heparin during simultaneous pancreas-kidney transplantation (SPKT) remains as a routine practice in some referral centers to minimize pancreatic graft thrombosis rate. One of its disadvantages is the theoretical increased risk of postoperative bleeding. In our center, we have abandoned its use since 2011. MATERIALS AND METHODS: We performed a retrospective analysis among 198 SPKTs performed in our center between the years 1989 and 2017. The variables of our study were vascular thrombosis of the pancreatic graft and hemoperitoneum and upper gastrointestinal bleeding in the mediate postoperative period (up to 2 months after the transplant). We compared these results between SPKT recipients who had undergone intraoperative heparinization (n = 157) and those who had not (n = 51). To avoid bias, a second comparison was performed using propensity score matching on the following characteristics: sex, recipient age, recipient body mass index, cold ischemia time, preoperative hemodialysis or peritoneal dialysis, time of diabetes, and Pancreas Donor Risk Index. Student t test or Mann-Whitney U test was used for intergroup comparisons of quantitative variables where appropriate, whereas χ2 or Fisher exact test was used to compare categorical data. RESULTS: No statistically significant differences were found when comparing the use of intraoperative heparin, even after the homogenization of both groups. CONCLUSIONS: In our experience, intraoperative heparinization during SPKT surgery was not useful because it did not significantly decrease the graft thrombosis rate, and its withdrawal did not enhance hemoperitoneum or upper gastrointestinal bleeding postoperative rates.

Pancreas Donor Hypernatremia: Is it Really a Risk Factor for Simultaneous Pancreas-kidney Transplantation?

INTRODUCTION: Solid organ donor hypernatremia has been classically reported to be a risk factor for cell lysis and graft damage. National criteria for pancreatic donation consider severe hypernatremia (sodium level more than 160 mEq/L) to be relative exclusion criteria. The aim of our study is to review the postoperative outcomes of our simultaneous pancreas-kidney transplantation (SPKT) sample in terms of pancreatic fistula, intra-abdominal abscesses, pancreatitis, pancreas graft thrombosis, early pancreatectomy, and reoperation rates regarding different ranges of donor sodium levels. MATERIAL AND METHODS: We performed a retrospective analysis among 161 SPKTs performed in our center between the years 2001 and 2017. We compared the aforementioned postoperative variables in two situations: 1) Whether the donor pancreas sodium levels were inferior to 149 mEq/L, or equal to or greater than 150 mEq/L; and 2) If they had severe hypernatremia (considering sodium levels greater than or equal to 160 mEq/L as threshold) or not. To ensure the comparability of the groups, a second comparison was performed on new samples after using propensity score matching. A Student t test or Mann-Whitney U test was used for intergroup comparisons of quantitative variables where appropriate, whereas a χ2 test or Fisher's exact test was used to compare categorical data. RESULTS: No statistically significant differences were found between the groups that relate high donor serum sodium levels with the morbidity variables included in our study or with early pancreatic graft loss. CONCLUSIONS: In our cohort, early postoperative main morbidity and pancreas graft loss of SPKT recipients do not differ significantly regarding donor serum sodium levels.

Validation of the Pancreatic Donor Risk Index in Simultaneous Pancreas-Kidney Transplantation Performed in Córdoba Hospital From 2000 to 2015.

BACKGROUND: The Pancreatic Donor Risk Index (PDRI) was developed in 2010 in the United States to predict graft survival after pancreas transplantation, based on donor characteristics and logistical and technical conditions. The aim of the study was to validate the utility of PDRI as a pancreas allograft survival predictor in simultaneous pancreas-kidney transplantation (SPK) transplants performed in our hospital between 2000 and 2015. METHODS: This retrospective analysis of 126 SPK transplants was performed by the same surgical team from the years 2000 to 2015. Donor variables that are integrated in the PDRI were calculated (age, sex, race, creatinine serum levels, body mass index, height, cold ischemia time, cause of death, type of pancreas transplant). Pancreatic graft survival at 1 and 5 years was calculated by use of the Kaplan-Meier test. Comparison of survival curves between PDRI risk quartiles was calculated by use of the log-rank test. Association between graft survival and variables integrating the PDRI was calculated by use of univariate Cox regression analysis. RESULTS: Log-rank analysis found no statistically significant association between global graft survival and PDRI quartiles. Univariate Cox regression analysis showed a statistically significant association between graft survival and cold ischemia time (P < .05). CONCLUSIONS: PDRI was not a useful tool to predict pancreatic graft outcomes in a Spanish reference population.

Prevalence and Predictors of Metabolic Syndrome After Liver Transplantation.

BACKGROUND: The development of metabolic syndrome (MS) after liver transplantation (LT) is a major source of mortality derived from cardiovascular events. The aim of the present study was to determine the prevalence and risk factors of MS after LT. METHODS: One-hundred seventy-four consecutive LT patients from January 2004 to June 2010 surviving longer than 1 year after LT were included. Median follow-up after LT was 48 months. Independent predictors of MS were obtained by means of multivariate logistic regression. RESULTS: At 3 years after LT, 25.5% of patients reached a body mass index (BMI) ≥30 kg/m2, 35.6% of patients developed arterial hypertension, 54.2% showed impaired fasting glucose, 22.5% had serum cholesterol >200 mg/dL, and 22.5% showed hypertriglyceridemia >150 mg/dL. The prevalence of MS ranged from 49% to 86% depending on the considered period. The pre-LT variables associated with MS were age at LT (odds ratio [OR], 1.08; P = .002), BMI of recipient before LT (OR, 1.23; P = .001), serum glucose (OR, 1.02; P = .005), and non-heart-beating donor (OR, 1.02; P = .046). The post-LT predictors of MS were body weight (OR, 1.04; P = .005), arterial hypertension (OR, 1.02; P = .047), and serum glucose (OR, 1.02; P = .011) at 6 months. CONCLUSIONS: LT patients develop MS in a high proportion and progressively despite current efforts (ie, lifestyle modifications and aggressive management of hypertension, diabetes, and hyperlipidemia). The associated risk factors include age, increased BMI, and pre- and post-LT glucose.

"Assessment of RIFLE and AKIN criteria to define acute renal dysfunction for HIPEC procedures for ovarian and non ovarian peritoneal malignances".

BACKGROUND: The acute renal dysfunction (ARD) is a common complication in cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (HIPEC). Our aim is evaluate the ARD post-HIPEC procedures using the RIFLE and AKIN criteria. Evaluate the risk factors and analyze ARD's impact on postoperative course. METHODS: From 2011 to 2014, in a retrospective way using a prospective database were operated by HIPEC procedure. The ARD was analyzed by RIFLE and AKIN criteria. The perioperative features were analyzed and a multivariate analysis was performed to define the risk factors to develop the ARD. RESULTS: 141 patients were treated and analyzed. The ARD was detected in 30.5% (Injury 18.4% and Failure 12.1%) when RIFLE criteria were applied. The multivariate analysis detected that decrease of pH during HIPEC [OR = 29.39 (5.09-169.76)], PCI [OR = 1.07 (1.01-1.15)] and ureteral catheters [OR = 12.71 (1.44-111.85)] were associated to the development of acute renal injury (ARI) post-HIPEC. Decrease of Na during HIPEC [OR = 1.15 (1.01-1.30)], intraoperative inotrope use [OR = 3.83 (1.12-13.09)] and PCI [OR = 1.06 (1.0-1.14)] were associated to acute renal failure (ARF) post-HIPEC. The ARD was related to a higher length of stay hospital (17.2 ± 11 vs. 13.8 ± 8 days) (p = 0.05) but no impact in early survival was observed in ARD group. CONCLUSIONS: The widespread use of RIFLE criteria for ARD would have major benefits in terms of accurately diagnosing patients undergone HIPEC procedures. The ARD has a detrimental impact in length of stay hospital. The knowledge of risk factors helps us to prevent the ARD post-HIPEC by means of an aggressive and multidisciplinary perioperative management.

Postoperative time course and utility of inflammatory markers in patients with ovarian peritoneal carcinomatosis treated with neoadjuvant chemotherapy, cytoreductive surgery, and HIPEC.

BACKGROUND: Inflammatory markers may help monitor postoperative evolution of surgical patients and detect complications. However, to date, the effect that neoadjuvant chemotherapy and hyperthermic intraperitoneal chemotherapy (HIPEC) may have in the postoperative kinetics of these parameters remains unknown. METHODS: Between July 2011 and June 2014, all patients who underwent neoadjuvant chemotherapy, cytoreductive surgery, and HIPEC for ovarian peritoneal carcinomatosis were studied. Patients were divided into four groups: no complications, noninfective complication, and infective complications during the first and second postoperative weeks. Retrospectively, C-reactive protein (CRP), neutrophil-to-lymphocyte ratio (NLR), white blood cell count, platelet-to-lymphocyte ratio, and prothrombin ratio were collected from postoperative days 1-14. Postoperative behavior of each parameter was carefully evaluated across groups. RESULTS: The study included 122 patients. Only CRP and NLR showed promising results. CRP presented a mean peak value at 48 h (186.1 mg/L), while NLR peaked at 24 h (10.21 mg/L). Both parameters rose with infective complications. Statistically significant differences were found at several time points compared with uncomplicated patients. A simple test comparing the peak value of CRP with the value when an infective complication was suspected accurately diagnosed these complications with sensitivity of 81 %, specificity of 91 %, and negative and positive predictive value of 93.1 and 76 %, respectively. This comparison presented lower diagnostic performance when NLR was used. CONCLUSIONS: Both CRP and NLR are useful in monitoring postoperative evolution in these patients; however, only CRP is useful for detecting infective complications.

Combined liver-kidney transplantation: survey of a single center in Spain.

BACKGROUND: Renal dysfunction is a common complication of advanced liver failure and liver transplantation. Since the introduction of the MELD criteria the proportion of patients with advanced chronic kidney disease and need for liver transplantation has increased. One alternative is the combined liver-kidney transplant (CLKT). The aim of this study was to evaluate the outcome of this type of transplant in our center. METHODS: We retrospectively analyzed all combined simultaneous or sequential transplants from 1989 to 2012. We studied demographic and clinical variables. Survival analysis was performed by Kaplan-Meier method. RESULTS: In the study period, 1,265 kidney and 1,050 liver transplantations were performed; 34 were CLKT (to 29 adults and 5 children); 13 of these were simultaneous and 12 sequential liver-kidney. We also carried out 4 triple liver-pancreas-kidney transplantations, 3 simultaneous and 1 sequential. The mean age was 44.1 ± 15 years, and 27 were male (93.1%); 9 (37.5%) were diabetic. The main causes of liver disease were viral (n = 11 [41.3%; hepatitis virus B, C, or both] and alcoholism (9 [31%]). The renal disease etiology was unknown in 16 (55.1%), IgA nephropathy in 2 (6.8%), membranoproliferative glomerulonephritis in 2 (6.8%), and calcineurin inhibitor toxicity in 4 (13.6%). Transjugular renal biopsy was performed in 6 sequential transplants. Survival of patients who received a CLKT was excellent: 91%, 51%, and 40%, at 1, 5, and 10 years, respectively. No significant difference was found between sequential and simultaneous transplants (log rank 0.5). CONCLUSIONS: Our results of CLKT show results similar or superior to those of other series and are an alternative to consider in candidates for liver transplantation with chronic kidney disease. Transjugular biopsy is an alternative to study the etiology of renal disease in patients with hepatic dysfunction before or after liver transplantation.

Tumores del estroma gastrointestinal (GIST): factores pronósticos de supervivencia tras citorreducción R0 / No disponible

Objetivo: analizar los posibles factores pronósticos de supervivenciaen tumores estromales gastrointestinales c-kit positivo(GIST), tras citorreducción óptima R0.Pacientes y método: estudio de 35 pacientes intervenidosen nuestra Unidad desde enero 2002 a febrero 2007, con tumoresdel estroma gastrointestinal CD117/c-kit positivo en los quese alcanzó citorreducción quirúrgica sin residuo tumoral macroscópico.Una base de datos prospectiva nos proporcionó las distintasvariables analizadas, de carácter demográfico, anatómico, clínico,histopatológico e inmunohistoquímico, entre otras. Elanálisis de la supervivencia actuarial se realizó según el método deKaplan-Meier y el análisis multivariante mediante el método de regresiónmúltiple de Cox.Resultados: la supervivencia global a 5 años fue del 77%,con una supervivencia media de 52 meses. El riesgo de malignidadsegún la clasificación de Fletcher y el tamaño tumoral mayorde 10 cm, influyeron significativamente de forma negativa sobrela supervivencia de los pacientes, tras el análisis univariante realizado(p < 0,05). La actividad proliferativa Ki-67 mayor del 50%fue la única covariable con significación estadística en el análisismultivariante. El 20% de los tumores recurrieron. Sólo 3 pacientesmetastáticos recibieron tratamiento adyuvante con mesilato deimatinib, todos ellos con Ki-67 > 50% y vivos en la actualidad.Conclusiones: el índice proliferativo Ki-67 podría representarun excelente marcador pronóstico de supervivencia en aquellospacientes con tumores del estroma gastrointestinal c-kit positivo.Su confirmación y el punto de corte adecuado deberían serobjeto de futuros estudios prospectivos, así como su posible utilidadpara seleccionar pacientes candidatos al tratamiento con mesilatode imatinib

Objective: to analyze the different factors predictive of survivalassociated with optimal R0-cytoreduction in c-kit-positivegastrointestinal stromal tumors.Methods: thirty-five patients were operated on in our OncologicalSurgery Department from January 2002 to February2007 because of CD117/c-kit-positive gastrointestinal stromal tumors,and an optimal surgical cytoreduction was obtained withoutmacroscopical residual disease. Demographic, anatomical, clinical,pathological, and immunohistochemical variables were analyzedfrom a specific database. Survival and multivariate analyseswere developed using Kaplan-Meier and multiple Cox regressionmodels, respectively.Results: five-year overall survival was 77% with a mean survivalof 52 months. Risk of malignant behaviour according toFletcher’s classification and tumor size higher than 10 cm had asignificantly negative influence on overall survival in the univariateanalysis (p < 0.05). Proliferative Ki-67 activity higher than 50%was the only statistically significant variable in the multivariateanalysis. Twenty percent of tumors recurred. Only 3 patients withmetastatic disease received adjuvant treatment with imatinib mesylate,all of them with Ki-67 > 50% and currently alive.Conclusions: the poliferative Ki-67 index could represent anexcellent predictive factor for survival in patients with c-kit-positivestromal gastrointestinal tumors. Confirmation and an adequatecut-off level should be the main objectives for futureprospective studies, mostly focused on the appropriate selectionof optimal candidates to imatinib-mesylate-based treatment

[Gastrointestinal stromal tumors (GIST): factors predictive of survival after R0-cytoreduction]. / Tumores del estroma gastrointestinal (GIST): factores pronósticos de supervivencia tras citorreducción R0.

OBJECTIVE: To analyze the different factors predictive of survival associated with optimal R0-cytoreduction in c-kit-positive gastrointestinal stromal tumors. METHODS: Thirty-five patients were operated on in our Oncological Surgery Department from January 2002 to February 2007 because of CD117/c-kit-positive gastrointestinal stromal tumors, and an optimal surgical cytoreduction was obtained without macroscopical residual disease. Demographic, anatomical, clinical, pathological, and immunohistochemical variables were analyzed from a specific database. Survival and multivariate analyses were developed using Kaplan-Meier and multiple Cox regression models, respectively. RESULTS: Five-year overall survival was 77% with a mean survival of 52 months. Risk of malignant behaviour according to Fletcher s classification and tumor size higher than 10 cm had a significantly negative influence on overall survival in the univariate analysis (p < 0.05). Proliferative Ki-67 activity higher than 50% was the only statistically significant variable in the multivariate analysis. Twenty percent of tumors recurred. Only 3 patients with metastatic disease received adjuvant treatment with imatinib mesylate, all of them with Ki-67 > 50% and currently alive. CONCLUSIONS: The poliferative Ki-67 index could represent an excellent predictive factor for survival in patients with c-kit-positive stromal gastrointestinal tumors. Confirmation and an adequate cut-off level should be the main objectives for future prospective studies, mostly focused on the appropriate selection of optimal candidates to imatinib-mesylate-based treatment.

Supervivencia del paciente trasplantado de hígado por hepatocarcinoma y riesgo de recurrencia tumoral / Survival of patients receiving a liver transplant for hepatocellular carcinoma, and risk of tumor recurrence

Objetivo: el objetivo de este estudio ha sido evaluar la supervivencia a corto y largo plazo del paciente trasplantado de hígado por hepatocarcinoma (CHC), el riesgo de recidiva tumoral postrasplante y los factores asociados a esta complicación. Diseño: estudio restrospectivo de una serie consecutiva de pacientes trasplantados de hígado por hepatocarcinoma. Pacientes y métodos: enfermos trasplantados por hepatocarcinoma desde el año 1989 hasta noviembre de 2003. Los pacientes fueron seleccionados con unos límites generales de tamaño y número de nódulos que fueron posteriormente publicados como criterios de Milán. En su diagnóstico pretrasplante se siguieron asimismo criterios consensuados en la Conferencia de Barcelona. Resultados: la supervivencia de este grupo de 81 pacientes trasplantados por hepatocarcinoma fue del 80, 61 y 52%, a los 1, 5 y 10 años respectivamente. En el 32% de los casos el CHC fue un hallazgo incidental en el explante. En el 12,3% se constató recidiva tumoral. El estudio multivariante identificó como factores de riesgo de recidiva el tamaño del nódulo (OR = 1,7944) (IC 95% = 1,1332-2,8413) y la invasión vascular (OR = 6,6346) (IC 95% = 1,4624-30,1003). Conclusiones: el trasplante de hígado en pacientes seleccionados con CHC obtiene buenos resultados a medio y largo plazo. El riesgo de recidiva tumoral postrasplante se ha reducido notablemente y está asociado con el tamaño del nódulo y con la invasión vascular microscópica

Objective: the goal of this research has been to evaluate the survival, in long and short term, of the patient receiving liver transplant for hepatocellular carcinoma (HCC), the risk of posttransplant tumor relapse and factors related to this complication. Design: retrospective study of a consecutive series of patients having had liver transplant for HCC. Patients and methodology: transplant patients for HCC from 1989 to November 2003. Patients were selected due to general limitations of nodule size and quantity, which were subsequently published as Milan criteria. Also, criteria agreed in the Conference of Barcelona were followed in the pre-transplant diagnosis. Results: the survival of this 81 patients group was of the 80, 61 and 52% for 1, 5 and 10 years respectively. In the 32% of the cases the HCC was an incidental finding in the explant. In the 12.3%, the tumor relapse was verified. The multivariate research identified the size of the nodule (OR = 1,7944) (IC 95% = 1,1332-2,8413) and the vascular invasion (OR = 6,6346) (IC 95% = 1,4624-30,1003) as risk factors of relapse. Conclusions: the liver transplant in selected patients with HCC has good results in medium and long term. The risk of post-transplant tumor relapse becomes notably reduced and is associated with the size of the nodule and the microscopic vascular invasion

Survival of patients receiving a liver transplant for hepatocellular carcinoma, and risk of tumor recurrence.

OBJECTIVE: The goal of this research has been to evaluate the survival, in long and short term, of the patient receiving liver transplant for hepatocellular carcinoma (HCC), the risk of post-transplant tumor relapse and factors related to this complication. DESIGN: Retrospective study of a consecutive series of patients having had liver transplant for HCC. PATIENTS AND METHODOLOGY: Transplant patients for HCC from 1989 to November 2003. Patients were selected due to general limitations of nodule size and quantity, which were subsequently published as Milan criteria. Also, criteria agreed in the Conference of Barcelona were followed in the pre-transplant diagnosis. RESULTS: The survival of this 81 patients group was of the 80, 61 and 52% for 1, 5 and 10 years respectively. In the 32% of the cases the HCC was an incidental finding in the explant. In the 12.3%, the tumor relapse was verified. The multivariate research identified the size of the nodule (OR=1,7944) (IC 95%=1,1332-2,8413) and the vascular invasion (OR=6,6346) (IC 95%=1,4624-30,1003) as risk factors of relapse. CONCLUSIONS: The liver transplant in selected patients with HCC has good results in medium and long term. The risk of post-transplant tumor relapse becomes notably reduced and is associated with the size of the nodule and the microscopic vascular invasion.