RESUMO
The topic of this monograph is liver cancer associated with chronic HCV infection. We start with some background information on chronic HCV infection and its long-term sequelae, one of which is liver cancer. The rest of the article is concerned with liver cancer or hepatocellular carcinoma (HCC). Epidemiology, risk factors, treatment and outcomes are discussed. We focus on those aspects that are of specific interest in people with haemophilia: studies performed in haemophilia populations, the use of invasive diagnostic and therapeutic tools and the outcome of liver transplantation. Throughout the paper, recommendations are given on surveillance for and diagnosis of HCC and on the practical aspects of invasive procedures. These recommendations are based on professional guidelines, other published evidence and the authors' experience. In general, diagnostic and therapeutic options are the same in persons with and without haemophilia.
Assuntos
Carcinoma Hepatocelular/etiologia , Hemofilia A/complicações , Hepatite C Crônica/complicações , Neoplasias Hepáticas/etiologia , Carcinoma Hepatocelular/diagnóstico , Carcinoma Hepatocelular/terapia , Humanos , Cirrose Hepática/diagnóstico , Cirrose Hepática/etiologia , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/terapia , Transplante de Fígado/métodos , Fatores de RiscoRESUMO
Symptom experience (occurrence and perceived distress) associated with side effects of immunosuppressive medications in organ transplant patients may well be associated with poorer quality of life and medication non-compliance. The aims of this study were: first, to assess symptom experience in clinically stable adult patients during long-term follow-up after liver transplantation; and second, to study the relationship between symptom experience and medication non-compliance. This cross-sectional study included 123 liver transplant patients. Symptom experience was assessed using the "Modified Transplant Symptom Occurrence and Symptom Distress Scale" (29-item version) at the annual evaluation. According to the duration of follow-up, patients were divided into a short-term (1-4 yr) and a long-term (5-18 yr) cohort. Medication non-compliance was measured using electronic monitoring. Results showed that increased hair growth was the most frequent symptom in both sexes. Symptom distress was more serious in women than in men. The most distressing symptom in women was excessive and/or painful periods, while in men this was impotence. Clear differences were revealed at item level between symptom occurrence and symptom distress in relationship with the two time cohorts and between sexes. No relationship was found between symptom experience and prednisolone non-compliance.
Assuntos
Terapia de Imunossupressão/efeitos adversos , Imunossupressores/uso terapêutico , Transplante de Fígado , Cooperação do Paciente , Adulto , Idoso , Azatioprina/uso terapêutico , Estudos Transversais , Ciclosporina/uso terapêutico , Feminino , Rejeição de Enxerto/prevenção & controle , Humanos , Masculino , Pessoa de Meia-Idade , Prednisolona/uso terapêutico , Qualidade de Vida , Adulto JovemRESUMO
BACKGROUND: Regulatory T-cells (Treg) are natural suppressors of autoimmunity. Previous studies indicate that immunosuppressive drugs, especially calcineurin-inhibitors, may interfere with Treg homeostasis. Inflammatory bowel disease (IBD) can relapse or develop de novo after liver transplantation. IBD is associated with a relative deficiency of Treg. The aim of this study was to determine the effect of long-term immunosuppression on the presence of Treg in the noninflamed colonic mucosa of liver transplant recipients. METHODS: Colonic biopsies of normal mucosa of 36 liver transplant recipients on different types of immunosuppression and 11 controls were studied. Treg marker Foxp3 and Treg products transforming growth factor-beta (TGF-beta) and interleukin-10 (IL-10) were studied by quantitative polymerase chain reaction (Q-PCR) and immunohistochemistry. TGF-beta-induced Smad-protein 3 and 7 were studied by Q-PCR. RESULTS: No significant differences between controls and patients were observed in IL-10, TGF-beta, and Smad expression. Mucosal Foxp3 mRNA levels and Foxp3+CD3+ cells were significantly reduced in transplant recipients using prednisone/azathioprine/tacrolimus compared with controls but no direct relationship between Foxp3 expression and 1 specific drug was detected. CONCLUSIONS: These results challenge the hypothesis that calcineurin-induced reduction of Treg or TGF-beta expression predisposes nontransplanted tissue to inflammation, but indicate that combined immunosuppression hampers Treg development in the intestine.
Assuntos
Colo/patologia , Rejeição de Enxerto/prevenção & controle , Terapia de Imunossupressão , Imunossupressores/uso terapêutico , Transplante de Fígado , Linfócitos T Reguladores/imunologia , Adulto , Idoso , Autoimunidade/efeitos dos fármacos , Biópsia , Complexo CD3/imunologia , Complexo CD3/metabolismo , Colo/metabolismo , Progressão da Doença , Fatores de Transcrição Forkhead/genética , Fatores de Transcrição Forkhead/metabolismo , Expressão Gênica/efeitos dos fármacos , Rejeição de Enxerto/imunologia , Humanos , Imuno-Histoquímica , Interleucina-10/genética , Interleucina-10/metabolismo , Mucosa Intestinal/metabolismo , Mucosa Intestinal/patologia , Hepatopatias/cirurgia , Masculino , Pessoa de Meia-Idade , RNA/genética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Proteína Smad3/genética , Proteína Smad7/genética , Linfócitos T Reguladores/efeitos dos fármacos , Fator de Crescimento Transformador beta/genética , Fator de Crescimento Transformador beta/metabolismoRESUMO
Liver transplantation has been an accepted treatment for end-stage liver disease since the 1980s. Currently it is a highly successful treatment for this indication. The aim of this review is to give a general update on recent developments in the field of liver transplantation. In the last decades considerable progress has been made in the care of liver transplant candidates and recipients. At present the one- and five-year patient survival rates are approximately 85 and 75%. The indications for liver transplantation are shifting and the number of absolute contraindications is decreasing. In the coming years, an increase in the number of transplant candidates can be expected. An important problem is the shortage of donor organs, for which many solutions are being explored. A recently introduced method for recipient selection is the MELD score using simple laboratory measurements. Perioperative care at the present time is characterised by a high degree of standardisation and rapidly declining blood loss during transplantation. Long-term care includes awareness and management of recurrent disease. Important causes of morbidity and mortality such as de novo malignancies and cardiovascular disease should be adequately screened for and managed. With the increasing success of liver transplantation, physicians should aim at reaching a normal life expectancy and quality of life for transplant recipients.
Assuntos
Hepatopatias/cirurgia , Transplante de Fígado/tendências , Humanos , Terapia de Imunossupressão , Transplante de Fígado/métodos , Prognóstico , Qualidade de Vida , Doadores de Tecidos , TransplanteRESUMO
BACKGROUND: Liver transplantation was started in our centre as early as 1979. We have studied the clinical outcome of patients surviving longer than 15 years, with special interest for the broad range of comorbidity and the self-perceived quality of life. METHODS: All patients who underwent a liver transplantation at an adult age, between March 1979 and February 1991, and who had survived at least 15 years were eligible for the study. Data were collected from the medical records. Health-related quality of life was assessed using the Six-Dimensional EuroQol test. RESULTS: The five-year survival of patients alive 15 years after transplantation was 78%. Thirty-seven patients are currently alive with a median follow-up of 18.8 years (range 15.0 to 26.8) after transplantation. Comorbidity consists predominantly of overweight (57%), osteoporosis (49%), de novo cancer (38%, mainly skin cancer), hypertension (38%), cardiovascular events (19%), diabetes mellitus (22%), cataract (24%), and renal clearance<50 ml/min (11%). The pattern of comorbidity seems to relate to the type of immunosuppression which consisted mainly of prednisolone and azathioprine. Quality of life was perceived as satisfactory (7 on a scale of 0 to 10). However, about half of the patients reported limitations in the domains mobility, usual activities and pain/discomfort. In addition a minority reported some anxiety or depression. CONCLUSION: The outcome of liver transplantation in this early cohort of patients is fairly good. Improvements may be achieved by adaptations in the immunosuppressive regimen.
Assuntos
Nível de Saúde , Transplante de Fígado/psicologia , Avaliação de Resultados em Cuidados de Saúde , Qualidade de Vida , Perfil de Impacto da Doença , Sobreviventes/psicologia , Adulto , Idoso , Comorbidade , Humanos , Imunossupressores/administração & dosagem , Imunossupressores/efeitos adversos , Hepatopatias/cirurgia , Transplante de Fígado/imunologia , Pessoa de Meia-Idade , Países Baixos , TempoRESUMO
UNLABELLED: OBJECTIVE. To describe the experience with combined liver and kidney transplantation at the University Medical Centre Groningen, The Netherlands. DESIGN. Retrospective. METHOD: Data were analysed from all patients who underwent combined liver and kidney transplantation in the University Medical Centre Groningen, in the period November 1994-December 2005. RESULTS: During the study period 582 orthotopic liver transplantations and 1026 isolated kidney transplantations were performed. 16 patients underwent combined liver and kidney transplantation: 4 were children (aged 17 months-16 years) and 12 were adults (aged 19-59 years). For all patients, both organs were obtained from the same post-mortem donor. Indications for combined liver and kidney transplantation were primary hyperoxaluria type I (n=6), polycystic liver and kidney disease (n=3) and unrelated liver and kidney failure (n=7). The 1- and 5-year survival rate was 88% (14/16), which was not significantly different from the results after isolated liver transplantation. Two patients died 11 days and 74 months after combined transplantation, due to complications from unsuccessful retransplantation of the liver for hepatic artery thrombosis and secondary biliary cirrhosis, respectively. A third patient died 51 days after combined transplantation due to sepsis. CONCLUSION: Combined liver and kidney transplantation was a life-saving intervention in this selected group of patients with combined liver and kidney failure. Patient survival was comparable to that of patients undergoing isolated liver transplantation.
Assuntos
Falência Renal Crônica/cirurgia , Transplante de Rim , Falência Hepática/cirurgia , Transplante de Fígado , Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Sobrevivência de Enxerto , Humanos , Hiperoxalúria Primária/complicações , Lactente , Transplante de Rim/métodos , Transplante de Rim/mortalidade , Transplante de Fígado/métodos , Transplante de Fígado/mortalidade , Masculino , Pessoa de Meia-Idade , Países Baixos/epidemiologia , Complicações Pós-Operatórias/mortalidade , Estudos Retrospectivos , Análise de Sobrevida , Resultado do TratamentoRESUMO
PURPOSE: The clinical significance of antineutrophil cytoplasmic autoantibodies (ANCA) in primary sclerosing cholangitis has not been established. We investigated whether analysis of the antigenic specificities of ANCA is useful for delineating clinical subsets of the disease. METHODS: Sixty-nine patients with primary sclerosing cholangitis were studied. The presence of ANCA was analyzed by indirect immunofluorescence. Antibodies directed against specific antigens--proteinase 3, myeloperoxidase, elastase, bactericidal/permeability-increasing protein, cathepsin G, and lactoferrin--were identified by enzyme-linked immunosorbent assay. RESULTS: ANCA were detected by indirect immunofluorescence in 46 (67%) patients. In antigen-specific enzyme-linked immunosorbent assays, 37 (55%) of the 69 patients had antibodies to one or more antigens: 32 (46%) had antibodies to bactericidal/permeability-increasing protein, 16 (23%) had antibodies to cathepsin G, and 15 (22%) had antibodies to lactoferrin. Only 3 patients had antibodies to proteinase 3. Antibodies to myeloperoxidase or elastase were not detected. Twenty (29%) patients had antibodies to different antigens simultaneously. ANCA as detected by indirect immunofluorescence were not significantly associated with the presence of cirrhosis nor with the coexistence of inflammatory bowel disease. However, antibodies to bactericidal/permeability-increasing protein and cathepsin G were both associated with the presence of cirrhosis, and antibodies to lactoferrin were more frequently detected in patients with primary sclerosing cholangitis in conjunction with ulcerative colitis than in those without inflammatory bowel disease. CONCLUSION: Defined specificities of ANCA in primary sclerosing cholangitis may be related to particular clinical features of the disease.
Assuntos
Anticorpos Anticitoplasma de Neutrófilos/sangue , Anticorpos Anticitoplasma de Neutrófilos/imunologia , Colangite Esclerosante/diagnóstico , Colangite Esclerosante/imunologia , Epitopos , Adulto , Idoso , Colangite Esclerosante/sangue , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
Improvement of graft survival after orthotopic liver transplantation is often attributed to cyclosporine. In order to assess the effects on liver function and histology, we compared the results of conventional immunosuppression (azathioprine/prednisolone = group I) and a triple drug regimen, which included CsA (group II) during the first year after transplantation. Group I consisted of 33 patients; group II of 18 patients. Significant differences are present in favor of the CsA regimen with regard to transaminases and cholestatic parameters. Liver synthesis function was slightly better, though already very good under conventional immunosuppression. One week after transplantation, normal histology was not observed in group I, while 90% of the patients showed acute rejection. In group II, 53% of the patients showed normal histology; only 40% of the patients in group II showed acute rejection (P less than 0.0002). One year after transplantation, liver histology was normal in 57% of the conventionally treated patients and in 90% of the CsA-treated patients. Also, less rejection occurred in group II during the first year after transplantation. One-year graft survival was 67% in group I and in group II 75%, which is not statistically different. Creatinine clearance did not differ in both groups. However compared with pretransplantation creatinine clearances, kidney function in the CsA-treated patients decreased with approximately 20 ml/min. These results show that liver synthesis and liver function are better under the CsA-containing triple-drug-maintenance regimen, which is supported by the far better liver histology. Kidney function is reduced, even under low dose CsA treatment.
Assuntos
Azatioprina/administração & dosagem , Ciclosporinas/administração & dosagem , Transplante de Fígado/fisiologia , Prednisolona/administração & dosagem , Biópsia , Creatinina/sangue , Quimioterapia Combinada , Sobrevivência de Enxerto , Humanos , Terapia de Imunossupressão/métodos , Rim/fisiologia , Fígado/metabolismo , Testes de Função Hepática , Transplante de Fígado/patologiaRESUMO
BACKGROUND: The purpose of this study was to investigate whether phosphorus-31 magnetic resonance spectroscopy (31P-MRS) of the isolated donor liver can serve as a viability indicator with prognostic value for transplantation outcome. METHODS: Forty human donor livers preserved with University of Wisconsin solution were studied shortly before transplantation. The respective spectral peak areas of the isolated donor liver were correlated with the amount of hepatocellular graft damage and liver metabolic function shortly after implantation. RESULTS: The individual phosphomonoesters, inorganic phosphate, phosphodiesters, and nicotine adenine dinucleotide peaks were not prognostic for postoperative hepatocellular damage or liver metabolic capacity. The presence of adenosine triphosphate, however, predicts a significantly better metabolic capacity to eliminate bilirubin, to synthesize fibrinogen and antithrombin III, and to maintain a better prothrombin time after transplantation. Furthermore, this study is probably the first 31P-MRS demonstration in the human liver of phosphocreatine. CONCLUSIONS: In the clinical setting described, metabolic assessment using 31P-MRS did not result in a reliable noninvasive test to predict primary graft dysfunction. Study of the role of phosphocreatine in liver metabolism during cold storage is needed.
Assuntos
Fígado/metabolismo , Doadores de Tecidos , Nucleotídeos de Adenina/fisiologia , Sobrevivência Celular , Seguimentos , Humanos , Fígado/química , Fígado/citologia , Transplante de Fígado/fisiologia , Espectroscopia de Ressonância Magnética , Fósforo , Prognóstico , Análise de Regressão , Fatores de TempoRESUMO
CMV disease often recurs after initially successful antiviral therapy. We retrospectively determined in a group of 36 organ transplant patients whether clinical, virological, or immunological parameters during or shortly after cessation of antiviral therapy can identify those at high risk of relapse. Eleven of 36 patients had recurrent CMV disease after ganciclovir therapy. Neither donor or recipient CMV serostatus, type of baseline immunosuppression, antirejection treatment, indication for antiviral treatment, nor presence of CMV in the blood during or after therapy (as detected by antigenemia, viremia, or a positive polymerase-chain-reaction signal) were helpful in identification of patients with subsequent relapse. However, quantitative monitoring of antigenemia fascilitated early diagnosis of relapse since 10 of 11 patients with > or = 10 antigen-positive cells per 50,000 PMNs relapsed (99.1%, 95% CI 58.7-99.8). IgM and IgG responses against CMV during primary infection were comparable in relapsing and nonrelapsing patients. During secondary infection relapse occurred only in the 4 patients with the lowest IgG responses. The number of activated CD8bright lymphocytes in the peripheral blood as determined by flow cytometry at the end of antiviral therapy was a strong risk factor for the subsequent clinical course: 6 of 7 patients (85.7%, 95% CI 42.1-99.6%) with < 100 x 10(3) HLADR+CD8bright cells/ml blood relapsed, while 8 of 8 (100%, 95% CI 63-100) with activated CD8bright cells above that level remained asymptomatic (P < .025). These data show that patients with a high risk of relapse of CMV disease can be identified at the end of antiviral therapy.
Assuntos
Infecções por Citomegalovirus/epidemiologia , Ganciclovir/uso terapêutico , Transplante de Rim/efeitos adversos , Transplante de Fígado/efeitos adversos , Formação de Anticorpos , Antígenos Virais/sangue , Citomegalovirus/isolamento & purificação , Infecções por Citomegalovirus/etiologia , Humanos , Imunoglobulina M/imunologia , Transplante de Rim/imunologia , Transplante de Fígado/imunologia , Subpopulações de Linfócitos/imunologia , Reação em Cadeia da Polimerase , Estudos Retrospectivos , Fatores de RiscoRESUMO
BACKGROUND: The development of immunological donor-specific hyporeactivity may account for the low incidence of chronic rejection after clinical liver transplantation. We investigated whether hyporeactivity commonly develops after liver transplantation by analyzing precursor frequencies of donor-reactive cytotoxic (CTLp) and helper (HTLp) T lymphocytes and mixed lymphocyte culture (MLC) reactivity in liver allograft recipients. We further studied whether CTLp hyporeactivity correlated with changes in donor-specific HTLp frequencies or suppressor cell activity. METHODS: CTLp and HTLp frequencies and MLC reactivity against donor and third-party spleen cells were determined in pre- and posttransplantation peripheral blood samples from 18 recipients with good graft function 2 years after transplantation. By mixing posttransplantation samples (with "putative" suppressor cell activity) with pretransplantation samples (in which normal CTL activity with no suppressor cell activity is expected), the presence of suppressor cell activity in peripheral blood was analyzed. RESULTS: Two years after transplantation, all but one (94%) of the recipients had developed CTLp hyporeactivity as evidenced by reduced donor-specific CTLp frequencies. The development of hyporeactivity was not specific for any particular underlying disease. The occurrence of HTL hyporeactivity, however, was less frequent: 38% and 20% of recipients were HTLp and MLC hyporeactive, respectively. Decreases in CTLp frequencies did not correlate with decreased donor-specific HTL function or suppressor cell activity in peripheral blood samples. CONCLUSIONS: Donor-specific CTLp hyporeactivity can develop in the majority of liver allograft recipients, irrespective of underlying disease. Donor-specific HTL hyporeactivity, however, occurs infrequently. A reduction in donor-specific CTLp frequencies was found to be independent of changes in donor-specific HTLp or suppressor cell activity, suggesting that other mechanisms (e.g., clonal deletion) are operative in the reduction of donor-specific CTLp after liver transplantation.
Assuntos
Tolerância Imunológica , Transplante de Fígado/imunologia , Imunologia de Transplantes , Humanos , Contagem de Linfócitos , Linfócitos T Citotóxicos/imunologia , Linfócitos T Auxiliares-Indutores/imunologia , Doadores de TecidosRESUMO
BACKGROUND: A decrease in donor-specific T cell precursor frequencies as seen late, one or more years, after transplantation is assumed to reflect transplantation tolerance, a condition important for long term acceptance of the allograft. However, such late decreases also occur in recipients that developed chronic transplant dysfunction questioning its relevance in transplantation tolerance. We investigated whether early, i.e., the first 6 months, decreases in donor-specific T cell precursor frequencies reflect transplantation tolerance and predict graft outcome after liver and lung transplantation. METHODS: Donor and third party specific cytotoxic (CTLp) and helper T lymphocyte precursor (HTLp) frequencies were analyzed in pretransplant and 1 (or 2) and 6-month blood samples taken from liver and lung recipients and were correlated with graft outcome. RESULTS: In liver allograft recipients with good graft function (n=7), mean donor-specific CTLp frequencies decreased as early as 1 month after transplantation and remained low thereafter. In contrast, mean CTLp frequencies did not decrease in liver allograft recipients with chronic transplant dysfunction (n=6). In lung allograft recipients, donor-specific CTLp frequencies remained relatively high and frequencies were not different between recipients without (n=6) or with (n=6) chronic transplant dysfunction. Donor-specific HTLp frequencies did not change significantly after liver or lung transplantation and did not differ between recipients without or with chronic transplant dysfunction. CONCLUSIONS: An early decrease in donor-specific CTLp correlates with good graft outcome after liver transplantation. Such rapid decreases in alloreactivity do not occur after lung transplantation illustrating the unique capacity of liver allografts to induce transplantation tolerance.
Assuntos
Transplante de Fígado/patologia , Transplante de Pulmão/patologia , Células-Tronco/citologia , Linfócitos T Citotóxicos/citologia , Humanos , Transplante de Fígado/fisiologia , Transplante de Pulmão/fisiologia , Resultado do TratamentoRESUMO
BACKGROUND: Seemingly conflicting results have been reported on the prevalence and severity of inflammatory bowel disease after liver transplantation. Regimens with different combinations of drugs can be used for immunosuppression after transplantation. AIM: To study retrospectively the prevalence of inflammatory bowel disease after liver transplantation, and the possible relationship with maintenance immunosuppressive regimens. METHODS: All 78 patients with end-stage primary sclerosing cholangitis (48 patients) or autoimmune cirrhosis (30 patients), transplanted between 1979 and July 2001, and with a follow-up of at least 1 year, were eligible for this study. In addition to patient and transplant characteristics, data on inflammatory bowel disease and immunosuppression before and after transplantation were collected. The Kaplan-Meier method was used for survival analysis. Possible risk factors for inflammatory bowel disease after transplantation were analysed by Cox univariate and multivariate regression. RESULTS: The median follow-up after transplantation was 7.2 years (range, 1.1-22.3 years). Nine of 25 patients with pre-transplant inflammatory bowel disease experienced flare-ups after transplantation. Six of 53 patients without pre-transplant inflammatory bowel disease developed de novo inflammatory bowel disease after transplantation. The cumulative risks (standard errors in parentheses) for inflammatory bowel disease were 6% (3%), 12% (4%) and 20% (5%) at 1, 3 and 5 years after transplantation, respectively. The inflammatory bowel disease-free survival was significantly higher in patients not receiving tacrolimus vs. those receiving tacrolimus, in patients receiving azathioprine vs. those not receiving azathioprine and in patients taking the regimen prednisolone-azathioprine-ciclosporin A vs. those taking tacrolimus-prednisolone. Pre-transplant inflammatory bowel disease and the use of tacrolimus were found to be independent predictors for inflammatory bowel disease after transplantation. CONCLUSIONS: The prevalence of inflammatory bowel disease after liver transplantation is affected by the immunosuppression used. Azathioprine seems to have a protective effect and tacrolimus a promoting effect.
Assuntos
Imunossupressores/efeitos adversos , Doenças Inflamatórias Intestinais , Transplante de Fígado , Complicações Pós-Operatórias/etiologia , Adolescente , Adulto , Idoso , Azatioprina/uso terapêutico , Ciclosporina/uso terapêutico , Quimioterapia Combinada , Feminino , Seguimentos , Humanos , Doenças Inflamatórias Intestinais/induzido quimicamente , Doenças Inflamatórias Intestinais/prevenção & controle , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/prevenção & controle , Estudos Prospectivos , Fatores de Risco , Tacrolimo/efeitos adversosRESUMO
RATIONALE AND OBJECTIVES: To analyze changes in Doppler ultrasound variables in relation to liver biopsy findings for the diagnosis of acute rejection after orthotopic liver transplantation (OLT), the authors performed in a prospective study 316 Doppler ultrasound examinations in the first 2 weeks after OLT on 23 patients. METHODS: Recordings were obtained daily from the hepatic artery (resistive index [RI]) and hepatic vein (damping index [DI]). Correlations were explored between the Doppler ultrasound findings and histologic data. The chi-square test was used to analyze differences in Doppler ultrasound variables in patients with and without acute rejection. RESULTS: Serial Doppler ultrasound examinations showed a significant increase in the RI in 11 of 22 patients (50%); the 23rd patient was excluded because of hepatic artery thrombosis. Despite an agreement in 15 of 22 patients (68%) no statistically significant correlation could be found (positive predictive value 6/11 = 55%; negative predictive value 9/11 = 82%; chi-square = 3.14; P > 0.05). A significant increase in the DI was observed in 14 of 23 patients (61%). However, no statistically significant correlation could be found as well with this parameter (positive predictive value 6/14 = 43%; negative predictive value 6/9 = 67%; chi-square = 0.00; P > 0.05). CONCLUSION: Serial Doppler ultrasound examinations were not helpful in predicting acute rejection.
Assuntos
Rejeição de Enxerto/diagnóstico por imagem , Artéria Hepática/diagnóstico por imagem , Veias Hepáticas/diagnóstico por imagem , Transplante de Fígado/diagnóstico por imagem , Doença Aguda , Adolescente , Adulto , Biópsia , Estudos de Casos e Controles , Criança , Pré-Escolar , Rejeição de Enxerto/patologia , Humanos , Lactente , Transplante de Fígado/patologia , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Estudos Prospectivos , Fatores de Tempo , Ultrassonografia DopplerRESUMO
RATIONALE AND OBJECTIVES: To analyze changes in Doppler ultrasound variables of the portal vein in relation to liver biopsy findings, the authors performed a prospective study of 316 Doppler ultrasound examinations in the first 2 weeks after orthotopic liver transplantation on 23 patients. METHODS: Recordings were obtained daily from the portal vein (diameter, maximum velocity, and flow). Correlations were explored between the Doppler ultrasound findings and histologic data. The chi-square test was used to analyze differences in Doppler ultrasound variables in patients with and without acute rejection. RESULTS: In our series of 23 patients, acute rejection was diagnosed by liver biopsy in nine of them (39%). Changes in portal vein diameter, maximum velocity, and flow did not correlate consistently with liver biopsy findings, due to a multifactorial origin. Changes in portal hemodynamics were observed in patients with hepatic artery thrombosis, portal vein stenosis, acute rejection, and sepsis. CONCLUSIONS: Although routine screening using Doppler ultrasound proved to be useful for the determination of rapid changes in portal hemodynamics within a short time, serial Doppler ultrasound examinations were not helpful in predicting acute rejection.
Assuntos
Rejeição de Enxerto/fisiopatologia , Transplante de Fígado/fisiologia , Sistema Porta/fisiopatologia , Ultrassonografia Doppler/métodos , Doença Aguda , Adolescente , Adulto , Biópsia , Velocidade do Fluxo Sanguíneo , Criança , Pré-Escolar , Rejeição de Enxerto/diagnóstico por imagem , Rejeição de Enxerto/patologia , Humanos , Lactente , Transplante de Fígado/patologia , Pessoa de Meia-Idade , Sistema Porta/diagnóstico por imagem , Estudos Prospectivos , Reprodutibilidade dos Testes , Transplante AutólogoRESUMO
RATIONALE AND OBJECTIVES: To describe the findings of routinely performed angiographic examinations in patients at discharge 2 months after orthotopic liver transplantation (OLT) and at follow-up 1 year later. METHODS: The findings of 315 angiographic examinations performed in 190 patients 2 months and 1 year after OLT were reviewed, and the changes at the anastomotic site of the hepatic artery and portal vein were analyzed. RESULTS: Routine angiography 2 months and 1 year after OLT demonstrated a normal anastomosis or low-grade stenosis in 82% and 84% of the patients (hepatic artery) and in 88% and 84% (portal vein), respectively. High-grade stenosis occurred in 9% and 5% of the patients (hepatic artery) and in 3% and 5% (portal vein). Hepatic artery occlusion and portal vein occlusion were observed in two and seven patients and in one and three patients, respectively. In 76% of patients, the anastomotic site of the hepatic artery did not change significantly. In eight patients, a normal anastomosis or a low- or medium-grade stenosis developed into high-grade stenosis or occlusion. Conversely, in nine patients, medium- or high-grade stenosis developed into a normal anastomosis or a low-grade stenosis. In all eight patients who initially had a high-grade stenosis, the hepatic artery proved to be patent at 1 year. In 98% of patients, the anastomotic site of the portal vein did not change significantly. In one patient who initially had a normal anastomosis, occlusion was found at I year. CONCLUSIONS: In most patients, routine angiography 2 months and 1 year after OLT demonstrated normal findings or a low-grade stenotic anastomosis of the hepatic artery and portal vein. Significant changes occurred mainly at the anastomotic site of the hepatic artery and could not be predicted by previous angiograms.
Assuntos
Artéria Hepática/diagnóstico por imagem , Transplante de Fígado/diagnóstico por imagem , Veia Porta/diagnóstico por imagem , Adulto , Anastomose Cirúrgica , Angiografia , Pré-Escolar , Constrição Patológica/diagnóstico por imagem , Constrição Patológica/patologia , Feminino , Seguimentos , Artéria Hepática/patologia , Humanos , Masculino , Veia Porta/patologia , Complicações Pós-Operatórias/diagnóstico por imagem , Fatores de TempoRESUMO
A Dutch family with familial amyloidotic polyneuropathy associated with the transthyretin mutation Val71Ala is described. This is the third reported family with this mutation, causing at the protein level an unstable TTR monomer and at the clinical level progressive wasting, polyneuropathy, autonomic dysfunction and vitreous opacities.
Assuntos
Substituição de Aminoácidos , Neuropatias Amiloides/genética , Mutação Puntual , Pré-Albumina/genética , Adulto , Idoso , Neuropatias Amiloides/patologia , Eletroforese das Proteínas Sanguíneas , Evolução Fatal , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Países BaixosRESUMO
Autonomic neuropathy is a well-known and prognostically important feature of systemic amyloidosis. In other conditions, autonomic function is commonly assessed by cardiovascular reflex tests, described by Ewing, but the feasibility of these tests has not been investigated in patients with systemic amyloidosis. We studied autonomic function in amyloidotic patients using cardiovascular tests and assessed their feasibility. Patients with AA, AL and ATTR amyloidosis participated. In all patients, cardiovascular reflex testing (mental arithmetic stress test and head-up tilting, besides the Ewing-tests) was performed. Of the 46 patients included, only 28 patients could perform all 4 Ewing-tests. In particular, patients with AA amyloidosis secondary to rheumatoid arthritis could not perform standing up and the isometric handgrip test. However, when the mental stress test replaced the handgrip test and head-up tilting replaced standing up, in 45 of the 46 patients, autonomic function could be assessed with cardiovascular reflex tests. Half of the patients with AA amyloidosis had signs of autonomic neuropathy--which was more than expected. We propose to replace the isometric handgrip test with the mental arithmetic stress test and standing up with head-up tilting if a patient is not able to perform these tests.
Assuntos
Amiloidose/fisiopatologia , Sistema Nervoso Autônomo/fisiopatologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Ecocardiografia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Miocárdio/patologia , Exame NeurológicoRESUMO
The biliary anastomosis has been considered the Achilles heel of liver transplantation, and especially the choledochocholedochostomy has been reported to be ill-fated. However, based on previous experimental experiences we decided to use the choledochocholedochostomy as the biliary anastomosis of preference in orthotopic liver transplantation. A choledochocholedochostomy has been performed in 29 of the 31 patients who have undergone transplantation since 1979. Five complications (17%) were diagnosed, of which one proved to be fatal. Two complications were related to the handling of the T-tube and required simple laparotomy to solve the intraperitoneal bile leakage. The other three complications were major: in one patient the choledochocholedochostomy was stenosed, requiring a conversion into a hepaticojejunostomy, while in two patients the donor common bile duct became necrotic. One of these patients underwent successful retransplantation, while the other died of sepsis. In both patients the hepatic artery anastomosis proved to be thrombosed, while in all patients without biliary complications the hepatic artery anastomosis was patent angiographically or at autopsy. The total incidence of sepsis was 26%, but in only four patients (13%) was sepsis related to the choledochocholedochostomy. The relationship between the necrosis of the donor bile duct and the patency of the hepatic artery anastomosis emphasizes an impeccable surgical technique. The low incidence of biliary complications in our 31 patients characterizes the choledochocholedochostomy as a relatively safe biliary procedure in clinical liver transplantation.
Assuntos
Ducto Colédoco/cirurgia , Transplante de Fígado , Humanos , Complicações Pós-Operatórias , Trombose/etiologiaRESUMO
A successful pregnancy occurred in the first year after liver transplantation. The patient was treated with prednisolone, azathioprine, and low-dose cyclosporine A. A healthy girl of 2260 g (fifth to tenth percentile) was born at 38 weeks.