RESUMO
INTRODUCTION: Liver transplant recipients often perform liver biopsy (LB), specially in the context of potentially recurring diseases, such as hepatitis C infection. However, the LB has risks of complications, despite being the gold standard. Transient elastography (TE) is a noninvasive method comparable to the LB to evaluate liver fibrosis in various settings, but its accuracy among transplant recipients is not fully understood. OBJECTIVE: To determine the accuracy of TE in liver transplant recipients compared with LB to successfully predict liver fibrosis. PATIENTS AND METHODS: Patients who underwent liver transplantation at Hospital Israelita Albert Einstein from 2010 to 2012 and presented with LB indication were also subjected to TE at the time of LB. The medium value of ten successful measurements was kept as a representative of the liver stiffness. The definition of cut-off points was made to ensure specificity of ≥90 % for all fibrosis stages (F0-F4). RESULTS: LB was performed in 267 patients. TE was not analyzed in only 8 (3 %) due to an elevated body mass index. The optimal liver stiffness cut-off value and diagnostic performance were 8.1 kPa for F ≥ 1, 12.3 kPa for F ≥ 2, 15.1 for F ≥ 3, and 16.7 for F = 4 for all patients and were 8.1 kPa for F ≥ 1, 12.3 kPa for F ≥ 2, 16.5 for F ≥ 3, and 17.6 for F = 4 for patients with hepatitis C. CONCLUSIONS: TE demonstrated good performance in defining cut-off points for fibrosis on liver histology observed in transplant recipients. The TE can be considered an alternative to LB in post-liver transplantation.
Assuntos
Técnicas de Imagem por Elasticidade/métodos , Cirrose Hepática/diagnóstico por imagem , Transplante de Fígado , Fígado/diagnóstico por imagem , Adulto , Idoso , Biópsia , Feminino , Hepatite C Crônica/complicações , Humanos , Fígado/patologia , Cirrose Hepática/etiologia , Cirrose Hepática/patologia , Cirrose Hepática/cirurgia , Cirrose Hepática Alcoólica/cirurgia , Masculino , Pessoa de Meia-Idade , Recidiva , Sensibilidade e Especificidade , Adulto JovemRESUMO
INTRODUCTION: Orthotopic liver transplantation (OLT) is an excellent option for patients with unresectable hepatocellular carcinoma (HCC) within the Milan criteria. Recurrence of HCC has a severe impact on post-OLT survival. In this study, we performed an analysis of post-OLT recurrence pattern of HCC. METHODS: The prospective cohort of OLT patients included those with unresectable HCC within the Milan criteria, and those beyond the Milan criteria who were downstaged with transcatheter arterial embolization until they achieved the Milan criteria. RESULTS: Between May 2006 and May 2011, we performed 130 OLT for unresectable HCC within the Milan Criteria among whom 9 patients (6.9%) experienced tumor recurrence. Two (22.2%) had undergone preoperative downstaging. At the time of OLT, mean serum alpha-fetoprotein levels were 623.8 ± 682.9 ng/mL. The liver explants showed 7 (77.8%) subjects were within the Milan criteria, with an average 2.6 ± 2.2 tumors, most of which (89%) were moderately differentiated. Microvascular and macrovascular invasion were observed in 5 (55.6%) and 2 (22.2%) cases, respectively. Liver explants were beyond the Milan criteria in both patients who had undergone preoperative downstaging. Recurrence occurred 23.1 ± 14.3 months after OLT, having been detected in the liver (n = 3; 33.3%), lung (n = 3; 33.3%), brain, peritoneum, and adrenal gland (n = 1 each; 11.1% each). Mean survival after detection of recurrence was 137.4 ± 96.4 days. CONCLUSIONS: Despite strict candidate selection criteria, HCC recurrence may occur after OLT, bearing a significant impact on posttransplant outcomes to optimize results requires refinements in candidate selection, as well as well-defined cost-effective post-OLT surveillance protocols.
Assuntos
Carcinoma Hepatocelular/cirurgia , Técnicas de Apoio para a Decisão , Neoplasias Hepáticas/cirurgia , Transplante de Fígado/efeitos adversos , Recidiva Local de Neoplasia , Idoso , Carcinoma Hepatocelular/diagnóstico , Carcinoma Hepatocelular/mortalidade , Carcinoma Hepatocelular/secundário , Feminino , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/mortalidade , Neoplasias Hepáticas/patologia , Transplante de Fígado/mortalidade , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Seleção de Pacientes , Estudos Prospectivos , Fatores de Tempo , Resultado do TratamentoRESUMO
INTRODUCTION: Since August 2010, The Brazilian National Transplantation System has allowed performance of liver transplantation (OLT) for patients with hepatocellular carcinoma (HCC) beyond the Milan criteria (MC) who have been successfully treated with preoperative downstaging (DS). Herein we sought to compare the clinical profiles and liver explant findings among patients with versus without preoperative DS. METHODOLOGY: Prospective cohort of patients with HCC within and beyond the MC undergoing OLT. Patients were considered for DS if they were beyond the MC without evidence of vascular invasion or extrahepatic disease. Transcatheter arterial chemoembolization was used for DS, which was considered to be successful if the MC were achieved at any moment during the follow-up. RESULTS: Between May 2006 and May 2010, we performed 130 OLTs in HCC patients, among whom 10 received preoperative DS. Both groups were comparable for gender, age, viral etiology, serum levels of alpha fetoprotein, and Child-Pugh and Model for End-Stage Liver Disease (MELD) scores (P > .05). The liver explants were within the MC in 80% of patients with preoperative DS and 90% of those without preoperative DS. They were comparable for the number of HCC nodules, total tumor size, histologic grade, and presence of microvascular invasion. Patients with pretransplant DS showed larger HCC nodules (33.3 ± 9.65 vs 26.3 ± 9.62 mm; P .029) and more frequent macrovascular invasion (1 vs 1 patient, P = .024). CONCLUSION: Preoperative DS for unresectable HCC may provide a curative treatment for patients who would otherwise be candidates for palliative therapy only. The baseline characteristics and liver explant findings were similar in both groups. We have yet to determine whether the differences observed regarding the size of the largest nodule and the higher frequency of macrovascular invasion have an impact on outcome.