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1.
Clin Exp Metastasis ; 40(3): 227-234, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-37183203

RESUMEN

Histopathological growth patterns (HGPs) of liver metastases represent a potential biomarker for prognosis after resection. They have never been studied in neuroendocrine tumor liver metastases (NETLM). This study evaluated if distinct HGPs can be observed in resected NETLM and if they have prognostic value. Sixty-three patients who underwent resection of NETLM between 01-01-2001 and 31-12-2021 were retrospectively included. HGPs were scored on Haematoxylin&Eosin slides using light microscopy, distinguishing desmoplastic- (dHGP), pushing- (pHGP) and replacement HGP (rHGP). Average HGP scores were calculated per patient. Each patient was classified according to predominant HGP. Overall and Disease-Free Survival (OS and DFS) were evaluated through Kaplan-Meier analysis and Cox regression. Eighteen patients had predominant dHGP (29%), 33 had predominant pHGP (52%) and 11 had predominant rHGP (17%). One patient had mixed HGP (2%). Five-year OS was 76% (95%CI: 66-87%) for the overall cohort. Five-year OS was 92% (95%CI: 77-100%) for dHGP, was 73% (95%CI: 59-91%) for pHGP, 50% (95%CI: 25-100%) for rHGP. Five-year DFS was 39% (95%CI: 19-83%) for dHGP, 44% (95%CI: 27-71%) for rHGP and 50% (95%CI: 23-100%) for pHGP. There was no significant association between HGP and OS or DFS in multivariable analysis. Distinct HGPs could be identified in NETLM. In patients who underwent resection of NETLM, no association was found between HGPs and postoperative survival. Half of the patients with NETLM have a predominant pushing growth pattern, which is a rare growth pattern in liver metastases from breast and colorectal cancer.


Asunto(s)
Neoplasias Colorrectales , Neoplasias Hepáticas , Tumores Neuroendocrinos , Humanos , Estudios Retrospectivos , Neoplasias Colorrectales/patología , Tumores Neuroendocrinos/cirugía , Neoplasias Hepáticas/secundario , Pronóstico , Hepatectomía
2.
Br J Surg ; 106(13): 1837-1846, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-31424576

RESUMEN

BACKGROUND: Secondary resection of initially unresectable colorectal cancer liver metastases (CRLM) can prolong survival. The added value of selective internal radiotherapy (SIRT) to downsize lesions for resection is not known. This study evaluated the change in technical resectability of CRLM with the addition of SIRT to FOLFOX-based chemotherapy. METHODS: Baseline and follow-up hepatic imaging of patients who received modified FOLFOX (mFOLFOX6: fluorouracil, leucovorin, oxaliplatin) chemotherapy with or without bevacizumab (control arm) versus mFOLFOX6 (with or without bevacizumab) plus SIRT using yttrium-90 resin microspheres (SIRT arm) in the phase III SIRFLOX trial were reviewed by three or five (of 14) expert hepatopancreatobiliary surgeons for resectability. Reviewers were blinded to one another, treatment assignment, extrahepatic disease status, and information on clinical and scanning time points. Technical resectability was defined as at least 60 per cent of reviewers (3 of 5, or 2 of 3) assessing a patient's liver metastases as surgically removable. RESULTS: Some 472 patients were evaluable (SIRT, 244; control, 228). There was no significant baseline difference in the proportion of technically resectable liver metastases between SIRT (29, 11·9 per cent) and control (25, 11·0 per cent) arms (P = 0·775). At follow-up, significantly more patients in both arms were deemed technically resectable compared with baseline: 159 of 472 (33·7 per cent) versus 54 of 472 (11·4 per cent) respectively (P = 0·001). More patients were resectable in the SIRT than in the control arm: 93 of 244 (38·1 per cent) versus 66 of 228 (28·9 per cent) respectively (P < 0·001). CONCLUSION: Adding SIRT to chemotherapy may improve the resectability of unresectable CRLM.


ANTECEDENTES: La resección secundaria de metástasis hepáticas de cáncer colorrectal (colorectal cancer liver metastases, CRLM) inicialmente irresecables puede prolongar la supervivencia. Se desconoce el valor añadido de la radioterapia interna selectiva (selective internal radiation therapy, SIRT). Este estudio evaluó el cambio en la resecabilidad técnica de las CRLM secundario a la adición de SIRT a una quimioterapia tipo FOLFOX. MÉTODOS: Las pruebas de radioimagen basales y durante el seguimiento de pacientes tratados con un régimen FOLFOX modificado (mFOLFOX6: fluorouracilo, leucovorina, oxaliplatino) ± bevacizumab (grupo control) versus mFOLFOX6 (± bevacizumab) más SIRT usando microesferas de resina de yttrium-90, en el ensayo de fase III SIRFLOX, fueron revisadas por 3-5 (de 14) cirujanos expertos hepatobiliares para determinar la resecabilidad. Los expertos efectuaron la revisión de forma ciega unos respecto a otros en relación con la asignación al tratamiento, estado de la enfermedad extra-hepática y situación clínica en el momento del estudio radiológico. La resecabilidad técnica se definió como ≥ 60% de revisores evaluando las metástasis del paciente como quirúrgicamente resecables. RESULTADOS: Fueron evaluables un total de 472 pacientes (control, n = 228; SIRT, n = 244). No hubo diferencias significativas basales en la proporción de metástasis hepáticas técnicamente resecables entre SIRT (29/244; 11,9%) y el grupo control (25/228; 11,0%: P = 0,775). Durante el seguimiento y en ambos brazos de tratamiento, un número significativamente mayor de pacientes se consideraron técnicamente resecables en comparación con la situación basal (54/472 (11,4%) basal y 159/472 (33,7%) al seguimiento). Hubo más pacientes resecables en el grupo SIRT que en el control (93/244 (38,1%) y 66/228 (28,9%); P < 0,001, respectivamente). CONCLUSIÓN: La adición de SIRT a la quimioterapia puede mejorar la resecabilidad de las CRLM irresecables.


Asunto(s)
Antineoplásicos/uso terapéutico , Neoplasias Colorrectales/patología , Hepatectomía/métodos , Neoplasias Hepáticas/terapia , Neoplasias Colorrectales/terapia , Femenino , Estudios de Seguimiento , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/secundario , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Radioterapia Adyuvante , Estudios Retrospectivos , Factores de Tiempo , Tomografía Computarizada por Rayos X , Resultado del Tratamiento
3.
Eur J Surg Oncol ; 43(9): 1656-1667, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28579357

RESUMEN

OBJECTIVE: Indocyanine green fluorescence-guided surgery (ICG-FGS) has emerged as a potential new imaging modality for improving the detection of hepatic, lymph node (LN), and peritoneal metastases in colorectal cancer (CRC) patients. The aim of this paper is to review the available literature in the clinical setting of ICG-FGS for tumoral detection in various fields of metastatic colorectal disease. METHODS: PubMed and Medline literature databases were searched for original articles on the use of ICG in the setting of clinical studies on colorectal cancer. The search terms used were "near-infrared fluorescence", "intraoperative imaging", "indocyanine green", "human" and "colorectal cancer". RESULTS: ICG fluorescence imaging (ICG-FI) is clearly supported as an intraoperative technique that allows the detection of additional superficial hepatic metastases of CRC. Data on the role of ICG-FI in the intraoperative detection of peritoneal metastases and LN metastases are scarce but encouraging and ICG-FI could potentially improve the staging and treatment of these patients. CONCLUSION: ICG-FI is a promising imaging technique in the detection of small infraclinic LN, hepatic, and peritoneal metastatic deposits that may allow better staging and more complete surgical resection with a potential prognostic benefit for patients.


Asunto(s)
Neoplasias Colorrectales/patología , Neoplasias Hepáticas/diagnóstico por imagen , Ganglios Linfáticos/diagnóstico por imagen , Imagen Óptica/métodos , Neoplasias Peritoneales/diagnóstico por imagen , Fluorescencia , Colorantes Fluorescentes/administración & dosificación , Humanos , Verde de Indocianina/administración & dosificación , Inyecciones Intravenosas , Neoplasias Hepáticas/secundario , Neoplasias Hepáticas/cirugía , Ganglios Linfáticos/cirugía , Metástasis Linfática , Neoplasias Peritoneales/cirugía
5.
Eur J Surg Oncol ; 41(9): 1256-60, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26081552

RESUMEN

PURPOSE: This short communication aims at reporting the potential role of ICG fluorescence imaging after an intraoperative IV injection in the detection of lymph nodes (LNs) of a colorectal cancer origin. PATIENTS AND METHODS: Two patients who were included in a protocol study evaluating the role of ICG in the detection of peritoneal metastases of colorectal origin (Protocol NCT-01995591) also had fluorescent LNs at exploration with a dedicated near-infrared camera system (Photodynamic Eye, PDE; Hamamatsu Photonics, Hamamatsu, Japan). An IV injection of ICG was delivered intraoperatively at 0.25 mg/kg. All LNs were also explored for their fluorescence, and tumor to background ratio (TBR) was calculated with IC-Calc 2.0 program. RESULTS: One patient had two retroperitoneal lymph node metastases and one mesocolic on a pre-operative work-up. The three tumoural lymph nodes at histopathology were hyperfluorescent in comparison to other uninvolved LNs. One patient had no pre-operatively known LN metastases and had one epigastric hyperfluorescent LN discovered at intraoperative exploration. This LN of 6 mm in size was malignant at histopathology. CONCLUSION: This is the first report about tumoural LN of colorectal cancer origin detected by fluorescence imaging with intraoperative IV free-ICG injection. ICG fluorescence imaging by intraoperative IV injection represents an easy method for detecting metastatic LNs in colorectal cancer. This proof of concept should lead to further research in this field.


Asunto(s)
Adenocarcinoma/patología , Neoplasias Colorrectales/patología , Colorantes , Verde de Indocianina , Ganglios Linfáticos/patología , Imagen Óptica/métodos , Adenocarcinoma/diagnóstico , Adenocarcinoma/cirugía , Neoplasias Colorrectales/diagnóstico , Neoplasias Colorrectales/cirugía , Femenino , Humanos , Inyecciones Intravenosas , Cuidados Intraoperatorios , Metástasis Linfática , Masculino , Mesocolon , Persona de Mediana Edad , Estudios Prospectivos , Espacio Retroperitoneal , Sensibilidad y Especificidad
6.
Eur J Surg Oncol ; 41(5): 674-82, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25630689

RESUMEN

BACKGROUND: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) was recently developed to induce rapid hypertrophy and reduce post-hepatectomy liver failure in patients with insufficient remnant liver volume (RLV). However, mortality rates >12% have been reported. This study aimed to analyze the perioperative course of ALPPS and to identify factors associated with morbi-mortality. METHODS: Between April 2011 and September 2013, 62 patients operated in 9 Franco-Belgian hepatobiliary centres underwent ALPPS for colorectal metastases (N = 50) or primary tumors, following chemotherapy (N = 50) and/or portal vein embolization (PVE; N = 9). RESULTS: Most patients had right (N = 31) or right extended hepatectomy (N = 25) (median RLV/body weight ratio of 0.54% [0.21-0.77%]). RLV increased by 48.6% [-15.3 to 192%] 7.8 ± 4.5 days after stage1, but the hypertrophy decelerated beyond 7 days. Stage2 was cancelled in 3 patients (4.8%) for insufficient hypertrophy, portal vein thrombosis or death and delayed to ≥9 days in 32 (54.2%). Overall, 25 patients (40.3%) had major complication(s) and 8 (12.9%) died. Fourteen patients (22.6%) had post-stage1 complication of whom 5 (35.7%) died after stage2. Factors associated with major morbi-mortality were obesity, post-stage1 biliary fistula or ascites, and infected and/or bilious peritoneal fluid at stage2. The latter was the only predictor of Clavien ≥3 by multivariate analysis (OR: 4.9; 95% CI: 1.227-19.97; p = 0.025). PVE did not impact the morbi-mortality rates but prevented major cytolysis that was associated with poor outcome. CONCLUSIONS: The inter-stages course was crucial in determining ALPPS outcome. The factors of high morbi-mortality rates associated with ALPPS are linked to the technique complexity.


Asunto(s)
Neoplasias de los Conductos Biliares/cirugía , Carcinoma/cirugía , Neoplasias Colorrectales/patología , Neoplasias de la Vesícula Biliar/cirugía , Hepatectomía/métodos , Fallo Hepático/prevención & control , Neoplasias Hepáticas/cirugía , Hígado/cirugía , Vena Porta/cirugía , Anciano , Conductos Biliares Intrahepáticos , Carcinoma/secundario , Carcinoma Hepatocelular/cirugía , Colangiocarcinoma/cirugía , Progresión de la Enfermedad , Embolización Terapéutica , Estudios de Factibilidad , Femenino , Hepatectomía/efectos adversos , Hepatectomía/mortalidad , Humanos , Ligadura , Hígado/diagnóstico por imagen , Neoplasias Hepáticas/secundario , Masculino , Persona de Mediana Edad , Radiografía , Estudios Retrospectivos , Resultado del Tratamiento
7.
Rev Med Brux ; 33(4): 229-36, 2012 Sep.
Artículo en Francés | MEDLINE | ID: mdl-23091926

RESUMEN

The treatment of hepatocellular carcinoma (HCC) in cirrhotic patients is challenging: the incidence is increasing, the cirrhosis dramatically limits the tolerance to treatment possibilities, there are many therapeutic modalities but resources are limited, namely in the context of organ shortage for transplantation. Liver transplantation (LT) is the optimal treatment as it combines the largest tumor resection possible and the correction of the underlying liver disease. Due to organ shortage however, LT is reserved for early-stages HCC. Surgical resection and radiofrequency destruction represent potentially curative options in highly selected patients. Arterial embolizations, chemo- or radio-embolizations, allow local tumor control but are not curative. These techniques could be performed before surgical resection or LT, to downstage the tumor and/or to control tumor progression while waiting for a graft. Finally, sorafenib is the only systemic treatment which has shown a survival benefit in advanced HCC. The benefit of combination of sorafenib and surgical treatments remains undetermined. The challenge in the management of HCC in cirrhotic patients is to integrate both individual (age, comorbidities, cirrhosis stage, tumor stage, specific contraindications to LT, etc.) and collective variables (expected waiting time before LT) to determine the best therapeutic option for each patient. In this process, multidisciplinarity is a key for success.


Asunto(s)
Carcinoma Hepatocelular/terapia , Comunicación Interdisciplinaria , Cirrosis Hepática/terapia , Neoplasias Hepáticas/terapia , Algoritmos , Carcinoma Hepatocelular/complicaciones , Carcinoma Hepatocelular/etiología , Hepatectomía/estadística & datos numéricos , Humanos , Cirrosis Hepática/complicaciones , Neoplasias Hepáticas/complicaciones , Neoplasias Hepáticas/etiología , Trasplante de Hígado/estadística & datos numéricos , Grupo de Atención al Paciente/organización & administración , Grupo de Atención al Paciente/estadística & datos numéricos , Factores de Riesgo
8.
Transplant Proc ; 43(9): 3490-2, 2011 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-22099825

RESUMEN

Several surgical techniques have been developed to allow liver transplantation in cases of complete portal vein thrombosis in the recipient. Despite this, these transplantations remain associated with a significant complication rate. We report herein a case of liver transplantation in a patient with complete portal vein thrombosis, underlying the potential pitfalls and the risk of intestinal sutures in case of hepaticojejunostomy. We discuss the technical options and their relative indications in such cases.


Asunto(s)
Fallo Hepático/terapia , Trasplante de Hígado/métodos , Vena Porta/cirugía , Trombosis de la Vena/terapia , Anastomosis Quirúrgica , Resultado Fatal , Humanos , Cirrosis Hepática Alcohólica/terapia , Neoplasias Hepáticas/terapia , Masculino , Persona de Mediana Edad , Trombosis/terapia , Resultado del Tratamiento
9.
Rev Med Brux ; 31(2): 93-101, 2010.
Artículo en Francés | MEDLINE | ID: mdl-20677664

RESUMEN

The results and risk factors within a cohort of 1.380 renal allografts treated with a calcineurin inhibitor from 1983 to 2008 at Erasme Hospital were analyzed. Three groups corresponding to successive periods were compared: A, from 1983 to 1992 (n = 463); B, from 1993 to 2000 (n = 470); C, from 2001 to 2008 (n = 447). Patient's survival was lower during period C than during periods A and B (89 vs 85% at 8 years, P = 0,044), due to the recipients age. In contrast, graft survival raised gradually (64, 76 and 81% at 8 years for periods A, B and C respectively, P < 0,001). Several factors significantly influence graft survival: in decreasing order, they are the recipient's age (reduced risk of rejection with age), immunosuppressive protocol (superiority of mycophenolate mofetyl and induction with antibodies directed to the IL2 receptor), HLA sensitization, number of HLA-B+Dr mismatches between recipient and donor, and gender (opposite effects of recipient's and donor's gender). The permanent evaluation of results using multivariate analyses would allow to promptly adapt selection and therapeutic strategies within each transplantation center.


Asunto(s)
Inhibidores de la Calcineurina , Inmunosupresores/uso terapéutico , Trasplante de Riñón , Adulto , Femenino , Supervivencia de Injerto , Hospitales , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Factores de Tiempo
10.
Am J Transplant ; 10(1): 99-105, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19845577

RESUMEN

A cohort of recipients of renal transplant after 2000 (N=310) was prospectively screened on the day of transplantation and 1 month later for a panel of 11 thrombophilic factors to assess their effect on posttransplant outcomes. All patients received prophylactic acetylsalicylic acid, started before transplantation. The rate of thromboembolic events or acute rejection episodes during the first posttransplant year (primary composite endpoint) was 16.7% among patients free of thrombophilic factor (N=60) and 17.2% in those with >or=1 thrombophilic factor (N=250) (p>0.99). The incidence of the primary endpoint was similar among patients free of thrombophilic factors and those with >or=2 (N=135), or >or=3 (N=53) factors (16.3% and 15.1% respectively; p=1) and in patients who remained thrombophilic at 1 month (15.7%; p=0.84). None of the individual thrombophilic factor present at the day of transplantation was associated with the primary endpoint. The incidence of cardiovascular events at 1-year, serum creatinine at 1-year, 4-year actuarial graft and patient survival were not influenced by the presence of >or=1 thrombophilic factor at baseline (p=NS). In conclusion, the presence of thrombophilic factors does not influence thromboembolic events, acute rejection, graft or patient survival in patients transplanted after 2000 and receiving prophylactic acetylsalicylic acid.


Asunto(s)
Aspirina/uso terapéutico , Trasplante de Riñón/efectos adversos , Trombofilia/etiología , Trombofilia/prevención & control , Enfermedad Aguda , Adulto , Enfermedades Cardiovasculares/prevención & control , Estudios de Cohortes , Creatinina/sangre , Femenino , Fibrinolíticos/uso terapéutico , Rechazo de Injerto/sangre , Rechazo de Injerto/etiología , Supervivencia de Injerto/efectos de los fármacos , Humanos , Trasplante de Riñón/fisiología , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Tasa de Supervivencia , Tromboembolia/etiología , Trombofilia/sangre , Factores de Tiempo , Resultado del Tratamiento
11.
Acta Chir Belg ; 109(4): 477-80, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19803258

RESUMEN

Cholecystectomy in cirrhotic patients remains a high risk procedure. The recent literature was reviewed in the objective to elaborate (evidence-based) recommendations for therapeutic decision. In patients with Child Pugh A or B cirrhosis, the laparoscopic approach should be preferred as it is associated with reduced morbidity and mortality as compared with open surgery (level B). In patients with decompensated Child Pugh C cirrhosis, the scarcity of literature data renders much more hazardous the definition of robust recommendations. In these patients, two options have to be considered beyond early laparoscopic cholecystectomy: first, a delayed surgery, in order to improve the preoperative patient's general condition and namely the coagulation, and second, a percutaneous drainage in very severe cases (level C).


Asunto(s)
Colecistectomía , Colecistitis Aguda/epidemiología , Cirrosis Hepática/epidemiología , Colecistectomía Laparoscópica , Colecistitis Aguda/cirugía , Comorbilidad , Cálculos Biliares/epidemiología , Cálculos Biliares/cirugía , Humanos , Hipertensión Portal/epidemiología , Hipertensión Portal/cirugía , Pronóstico
12.
Transplant Proc ; 41(2): 569-71, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19328927

RESUMEN

BACKGROUND: The Belgian Transplant Coordinators Section is responsible for the yearly data follow-up concerning donor and transplantation statistics in Belgium and presents herein a 10-year overview. METHODS: The procurement and transplant statistics were compared between 2 periods: Period 1 (P1, 1997-2005) versus Period 2 (P2, 2006-2007). RESULTS: The kidney and liver waiting lists (P1 vs P2) showed an overall decrease for a period of 2 consecutive years in P2; kidney (-170 patients; -18%), and liver (-83 patients; -34%). All other waiting lists (heart, lung, pancreas) remained stable. Mean ED further increased (P1 vs P2); 229 (P1) versus 280 (P2, +22.27%). Non-heart-beating donors were significantly (+288%) more often procured in P2. Mean donor age was 37.9 +/- 17.8 years (P1) versus 46.5 +/- 19.9 years (P2), and mean organ yield per donor was 3.48 +/- 1.7 (P1) versus 3.38 +/- 1.8 (P2). Overall transplant activity per million inhabitants increased 21.1%. CONCLUSION: For 2 consecutive years, the Belgian statistics showed significantly increased donor activity with an impact on waiting list dynamics and transplantation. The mean organ yield per donor was not influenced despite an increased average age and change in reason for death.


Asunto(s)
Donantes de Tejidos/estadística & datos numéricos , Bélgica , Cadáver , Causas de Muerte , Estudios de Seguimiento , Trasplante de Corazón/estadística & datos numéricos , Humanos , Trasplante de Riñón/estadística & datos numéricos , Trasplante de Hígado/estadística & datos numéricos , Trasplante de Pulmón/estadística & datos numéricos , Trasplante de Páncreas/estadística & datos numéricos , Derivación y Consulta , Factores de Tiempo , Listas de Espera
13.
Transplant Proc ; 41(2): 579-81, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19328930

RESUMEN

Demand for organs for transplantation continues to be greater than supply. Non-heart-beating donation (NHBD) has been reintroduced to reverse this trend. We describe the findings of a short questionnaire that determined the attitudes and feelings of nursing staff in a department of intensive care with an established NHBD program. Despite several educational sessions, only 3% of the nurses thought they were adequately informed about NHBD. Thirty-eight percent of nurses were less comfortable with NHBD than with brain death organ donation. NHBD is an ethically controversial area but one that can improve organ availability for transplantation. Adequate education, ongoing audit, and full transparency are needed in units that use NHBD.


Asunto(s)
Actitud Frente a la Muerte , Muerte Encefálica , Unidades de Cuidados Intensivos , Personal de Enfermería en Hospital , Donantes de Tejidos/estadística & datos numéricos , Bélgica , Enfermedad Crítica/mortalidad , Ética Médica , Ética en Enfermería , Hospitales Universitarios , Humanos , Cuidados para Prolongación de la Vida , Educación del Paciente como Asunto , Órdenes de Resucitación , Encuestas y Cuestionarios
14.
Transplant Proc ; 41(2): 603-6, 2009 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-19328936

RESUMEN

Minimization or withdrawal of immunosuppressive treatments after organ transplantation represents a major objective for improving quality of life and long-term survival of grafted patients. Such a goal may be reached under some clinical conditions, particularly in liver transplantation, making these patients good candidates for tolerance trials. In this context in liver transplantation, the central questions are (1) how to promote the natural propensity of the liver graft to be accepted, (2) which type of immunosuppressive drug should be used for induction and maintenance, and (3) which biomarkers could be used to discriminate tolerant patients from those requiring long-term immunosuppression. Induction therapies using aggressive T-cell-depleting agents may favor graft acceptance. However, persistent and/or rapidly reemerging cell lines, such as memory-type cells or CD8(+) T cells, could represent a significant barrier for induction of tolerance. The type of maintenance drugs also remains questionable. Calcineurin inhibitors may be eventually deleterious in the context of tolerance protocols, through inhibitory effects on regulatory T cells, that are not observed with rapamycin. In conclusion, significant efforts must be made to achieve reliable strategies for immunosuppression minimization or withdrawal after organ transplantation into the clinics.


Asunto(s)
Protocolos Clínicos/normas , Inmunosupresores/uso terapéutico , Trasplante de Hígado/inmunología , Tolerancia al Trasplante/fisiología , Relación Dosis-Respuesta a Droga , Humanos , Terapia de Inmunosupresión/métodos , Inmunosupresores/efectos adversos , Pruebas de Función Hepática , Trasplante de Hígado/fisiología , Depleción Linfocítica , Guías de Práctica Clínica como Asunto , Linfocitos T/inmunología , Tolerancia al Trasplante/efectos de los fármacos
15.
Rev Med Brux ; 29(1 Suppl): S33-9, 2008.
Artículo en Francés | MEDLINE | ID: mdl-18497218

RESUMEN

Since 1965, more than 2000 renal transplantations (including more than 100 living-donor transplantations) have been performed at the University of Brussels. An end-stage renal disease patient candidate to renal transplantation will be therefore followed from his enrolment on the waiting list to the long-term post-transplant period. Improvement in the outcome of renal transplantation is achieved due to better knowledge in many fields of medicine, such as immunology, infectious disease, metabolic diseases (hyperlipemia, diabetes mellitus), pharmacology, use of immunosuppressive regimen, a more adequate cardiovascular prevention and treatment. If the best results were achieved with kidneys from living donors, the graft survival rate at the University of Brussels was nearly 80% for the last period (2000-2006). Unfortunately, renal transplantation cannot cure certain comorbid conditions and even may promote them: infectious diseases, neoplasia, metabolic disorders (e.a diabetes mellitus, hyperlipemia). Many efforts have to be done to develop less toxic and more immune selective therapeutic strategies. Living donation and extension of the pool of cadaveric donors will reduce the length of time spent on the waiting list and will significantly impact on mortality and morbidity after kidney transplantation.


Asunto(s)
Trasplante de Riñón/estadística & datos numéricos , Bélgica/epidemiología , Cadáver , Supervivencia de Injerto , Hospitales Universitarios , Humanos , Trasplante de Riñón/mortalidad , Trasplante de Riñón/fisiología , Donadores Vivos , Estudios Retrospectivos , Donantes de Tejidos , Insuficiencia del Tratamiento , Resultado del Tratamiento
16.
Rev Med Brux ; 29(1 Suppl): S41-4, 2008.
Artículo en Francés | MEDLINE | ID: mdl-18497219

RESUMEN

Recent developments in basic and translational immunology open new exciting perspectives for the induction of transplantation tolerance in the clinic. However, a number of hurdles still need to be overcome before immunosuppressive drugs can be safely withdrawn in solid organ transplant recipients. With this background, the European Commission recently launched several initiatives to tackle unmet needs in transplantation medicine. Herein, we focus attention on the RISET project, an ongoing collaborative effort across the European Union aiming at minimization of immunosuppression on the basis of validated biomarkers.


Asunto(s)
Trasplante de Órganos/fisiología , Trasplante de Órganos/estadística & datos numéricos , Tolerancia al Trasplante/fisiología , Biomarcadores/análisis , Unión Europea , Humanos , Inmunosupresores/uso terapéutico
17.
Minerva Gastroenterol Dietol ; 54(1): 49-55, 2008 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-18299667

RESUMEN

Acute liver failure is a challenging clinical condition, associated with high morbidity and mortality. In well-selected patients, LT (LT) is the only therapeutic which has been demonstrated to improve patient survival. Clichy and King's College criteria are the two mains scoring systems used to select the patients for liver transplantation. Both models achieve high specificity but remain associated with limited negative predictive value. Several other predictive factors have been evaluated, but none of them have been strongly validated so far. Globally, whole LT appears as the procedure of choice for patients within Clichy and/or King's College criteria. Due to the severity of the disease and its multisystemic consequences, the results of LT for fulminant liver failure remain inferior to those obtained in elective indications. Accord-ing to local conditions, namely expected waiting time before urgent transplantation and surgical expertise, living donor transplantation and auxiliary transplantations appear as valuable alternatives. These techniques have the respective potential advantages to limit the waiting period before transplantation and to avoid the need for lifelong immunosuppression when native liver recovers, but overall results remain inferior to those obtained with whole LT.


Asunto(s)
Fallo Hepático Agudo/cirugía , Trasplante de Hígado , Humanos , Trasplante de Hígado/métodos , Selección de Paciente
18.
J Gastrointest Surg ; 12(6): 1149-50, 2008 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-17805934

RESUMEN

BACKGROUND: Peripheral cholangiocarcinoma with endobiliary thrombus could be confused with Klatskin tumor, eventually leading to inappropriate therapeutic decision. CASE REPORT: A 56-year-old man presented with an obstructive jaundice. Preoperative magnetic resonance imaging (MRI) showed a segment 7 liver tumor associated with a complete stop at the biliary bifurcation compatible with a Klatskin tumor. Surgical exploration revealed that biliary obstruction was caused by endobiliary tumor-related thrombus. A right hepatectomy was performed, allowing complete endobiliary thrombus extraction. At pathology, a T2N0 intrahepatic cholangiocarcinoma was demonstrated. No adjuvant chemotherapy was given and currently, 22 months after surgery, the patient remains disease free. DISCUSSION: This case underlines the fact that intraductal growth of peripheral cholangiocarcinoma does not represent a contraindication for surgical treatment. MRI could be useful to differentiate such presentation of peripheral cholangiocracinoma from Klatskin tumor and orientate the surgical treatment.


Asunto(s)
Neoplasias de los Conductos Biliares/diagnóstico , Conductos Biliares Intrahepáticos , Colangiocarcinoma/diagnóstico , Ictericia/diagnóstico , Tumor de Klatskin/diagnóstico , Trombosis/diagnóstico , Anastomosis Quirúrgica/métodos , Neoplasias de los Conductos Biliares/complicaciones , Neoplasias de los Conductos Biliares/cirugía , Colangiocarcinoma/complicaciones , Colangiocarcinoma/cirugía , Diagnóstico Diferencial , Estudios de Seguimiento , Hepatectomía/métodos , Conducto Hepático Común/cirugía , Humanos , Ictericia/etiología , Ictericia/cirugía , Yeyuno/cirugía , Masculino , Persona de Mediana Edad , Trombosis/complicaciones , Trombosis/cirugía
19.
Transplant Proc ; 39(8): 2637-9, 2007 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17954197

RESUMEN

BACKGROUND: The Belgian Section of Transplant Coordinators, created in 1997 under the auspices of the Belgian Transplant Society, is in charge of the collection of the national data about donor/procurement activities. METHODS: Data are collected in all Belgian transplant centers. An annual report is finalized by combining these data with data from the Eurotransplant database. RESULTS: An increase of both potential donors (n = 501, +14.4%) and effective donors (n = 273, +16.7%) was observed in 2006 versus 2005. Among effective donors, 28 were non-heart-beating donors (10.25%). Overall donor ratio was 26.26 donors per million inhabitants. Within potential donors, absence of organ harvesting was due to medical contraindications (28%), family refusal (13%), or legal refusal (2%). Donor mean age was 46.4 years and mean organs/donor was 3.21 +/- 1.7. An overall reduction of Belgian waiting lists was observed in 2006 as compared with 2005 (-5.7% for kidney, -25.7% for liver, -9.4% for heart, -6.7% for lung, and -11.7% for pancreas), while waiting list mortality was 18% for liver, 11% for heart, and 7% for lung. As compared with 2005, transplant activities increased for kidney (n = 485, +24.3%), heart +/- lungs (n = 73, +7.3%), and lungs (n = 83, +39.4%) but decreased for liver (n = 236, -2.1%). Living donation represented 8.45% for kidney (+28.1% vs 2005) and 8% for liver transplantation (-29.6%). CONCLUSION: Globally, a marked increase of procurement and transplant activities was observed in 2006, allowing to limit waiting list and waiting list mortality. Further increase of living donor activity and non-heart-beating donation remains necessary to extend the donor pool.


Asunto(s)
Donantes de Tejidos/estadística & datos numéricos , Obtención de Tejidos y Órganos/estadística & datos numéricos , Trasplante/estadística & datos numéricos , Bélgica , Humanos , Estudios Retrospectivos , Sociedades Médicas , Listas de Espera
20.
Transplant Proc ; 39(8): 2668-71, 2007 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17954203

RESUMEN

BACKGROUND: Due to the organ shortage, marginal donors are increasingly used in liver transplantation (OLT). These grafts may be safely used in less critical recipients but, the real influence of extended donor criteria (EDC) remains uncertain when graft-recipient matching is not applied. Our study analyzed the impact of EDC on initial graft function within the Eurotransplant patient-driven allocation system. PATIENTS AND METHODS: We reviewed 70 OLT performed between 2004 and 2006. The impact of the following EDC were analyzed: age > 60; intensive care unit (ICU) stay > 4 days; peak serum Na(+) > 160 mEq/L; body mass index (BMI) > 30; cardiac arrest with cardiopulmonary resuscitation, and high doses of vasopressors. Early graft function, as defined according to peak transaminase level and spontaneous prothrombin time within the first 5 posttransplant days, was compared between the donors with none or one criterion (group A = 39) and those with >1 criterion (group B = 31). RESULTS: The most frequent EDC were high vasopressor use, ICU stay > 4 days and BMI > 30, were present in respectively 44%, 27%, and 16% of the donors. No EDC were present in 13 donors, one in 26, three in eight, and four in three. Demographics and origin and severity of the liver disease were similar in both groups. We failed to observe significant differences in initial graft function. CONCLUSION: The presence of EDC did not significantly affect early graft function in a population where donor and recipient were not matched. While this observation must be confirmed in a multicenter analysis, it tends to support the use of marginal liver grafts, even in patient-driven allocation systems.


Asunto(s)
Trasplante de Hígado/estadística & datos numéricos , Donantes de Tejidos/estadística & datos numéricos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Índice de Masa Corporal , Reanimación Cardiopulmonar/estadística & datos numéricos , Femenino , Paro Cardíaco/epidemiología , Humanos , Unidades de Cuidados Intensivos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Selección de Paciente , Estudios Retrospectivos , Donantes de Tejidos/provisión & distribución
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