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CLINICAL ISSUE: The mean number of trauma room admissions and applied CT dose increase as the severity of injuries decreases. Therefore, appropriateness of established procedures should be re-evaluated. STANDARD RADIOLOGICAL METHODS: Considering severely injured patients with an Injury Severity Score (ISS) ≥16, whole body CT (WB-CT) compared to selective CT decreased mortality by about 25%. Thus, the ISS is a good indicator for the severity of injuries. However, since ISS can only be determined after diagnosis, it does not help with the primary assessment. METHODOLOGICAL INNOVATION AND EVALUATION: In addition to the currently used very fast WB-CT protocol with the highest diagnostic precision, a second protocol should be established applying a substantially lower dose. Under ongoing resuscitation, WB-CT often makes a substantial contribution towards targeted therapy or to justifying the discontinuation of resuscitation measures. The WB-CT findings should be performed several times and, at least in the acute emergency situation, it should follow the ABCDE scheme as close as possible. PRACTICAL RECOMMENDATIONS: In the trauma room it should be initially decided whether the classification as polytrauma is to be maintained. If yes, every institution should provide a dose-reduced WB-CT protocol in addition to the maximum variant used so far. Dose-reduced WB-CT seems to be appropriate for stable and oriented patients, who receive a CT primarily because of the trauma mechanism. Even under resuscitation conditions, WB-CT is easy to perform and medically as well as ethically of high value. The reporting and communication should be structured according to "diagnose first what kills first".
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Tratamiento de Urgencia/métodos , Traumatismo Múltiple/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Tratamiento de Urgencia/normas , Humanos , Puntaje de Gravedad del Traumatismo , Traumatismo Múltiple/etiología , Traumatismo Múltiple/mortalidad , Dosis de Radiación , ResucitaciónRESUMEN
BACKGROUND: The incidence of silent cerebral lesions (SCL) after atrial fibrillation (AF) ablation is highly variable, depending on the technology used. Recently, an increased risk for SCL has been described for a novel, nonirrigated ablation tool using multielectrode phased radiofrequency (PVAC). The aim of this prospective study was to evaluate the incidence and long-term follow-up of SCL in patients undergoing robotically assisted pulmonary vein isolation (RA-PVI) as compared with manual PVI. METHODS AND RESULTS: Circumferential PVI using irrigated radiofrequency current was performed on 70 patients (41 patients with paroxysmal AF, 59%). Fifty patients underwent RA-PVI and 20 patients underwent a manual approach. Cerebral MRI was performed the day before and the day after the ablation procedure; follow-up MRI was performed on 9 of 12 (75%) patients after a follow-up period of 21 months. SCLs were found in 12 of 70 (17%) patients in this study; the incidence of SCLs was similar in patients undergoing RA-PVI as compared with manually ablated patients (n=9, 18% versus n=3, 15%; probability value=1.0). In 1 patient undergoing manual PVI (1%), an SCL with asymptomatic subarachnoid hemorrhage was detected; the bleeding completely resolved within 1 month. Transient ischemic attack occurred in 1 (1%) patient 2 days after manual PVI. After a median follow-up period of 21 months, no residual SCLs were detected. CONCLUSIONS: The incidence of SCL using the robotic navigation system was 18% in this study. Incidence and size of SCL appears to be similar after RA-PVI as compared with manual PVI. Repeat MRI showed no residual SCLs at long-term follow-up.
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Fibrilación Atrial/cirugía , Ablación por Catéter/métodos , Sistema de Conducción Cardíaco/cirugía , Venas Pulmonares/cirugía , Robótica/instrumentación , Accidente Cerebrovascular/epidemiología , Anciano , Fibrilación Atrial/complicaciones , Fibrilación Atrial/fisiopatología , Electrocardiografía , Diseño de Equipo , Femenino , Estudios de Seguimiento , Alemania , Humanos , Incidencia , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Factores de Riesgo , Accidente Cerebrovascular/diagnóstico , Accidente Cerebrovascular/etiología , Factores de Tiempo , Resultado del TratamientoRESUMEN
INTRODUCTION: We report a comparative analysis of 2 sequential, prospective phase II trials on the efficacy of platinum/leucovorin/5-fluorouracil (PLF) +/- paclitaxel (T-PLF) in the neoadjuvant treatment of adenocarcinoma of the esophagus (AEG I). PATIENTS AND METHODS: Inclusion criteria were histologically proven, locally advanced AEG I stage uT3/4 anyN cM0/M1a. 67 patients were treated with either PLF (n = 32) or T-PLF (n = 35). Paclitaxel (80 mg/m(2)) was added to PLF on days 1, 15, and 29. Primary endpoint was the response. Additionally, 5-year survival was analyzed. RESULTS: The study population was well balanced, apart from an imbalance in clinical cM1a (33.3% PLF vs. 8.6% T-PLF; p = 0.01). Histopathological response rates (23.3% PLF vs. 25.0% T-PLF) showed no significant difference. Clinical response rates were improved for T-PLF (21.9 vs. 45.7%; p = 0.04). Median overall survival for clinical and histopathological responders was significantly improved for T-PLF (p = 0.005, p = 0.01), but not for PLF (p = 0.08, p = 0.25). Median overall survival was better with T-PLF without reaching statistical significance (18.9 months PLF vs. 43.1 months T-PLF; p = 0.27). Toxicity was slightly increased by paclitaxel. No treatment-related deaths occurred. CONCLUSION: Our data failed to demonstrate statistically significant superiority of the T-PLF regimen except for clinical response. However, there was a trend towards improved survival.
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Adenocarcinoma/tratamiento farmacológico , Ensayos Clínicos Fase II como Asunto , Neoplasias Esofágicas/tratamiento farmacológico , Paclitaxel/administración & dosificación , Adulto , Anciano , Antineoplásicos Fitogénicos/administración & dosificación , Antineoplásicos Fitogénicos/efectos adversos , Quimioterapia Adyuvante/métodos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante/métodos , Paclitaxel/efectos adversos , Resultado del TratamientoRESUMEN
PURPOSE: We prospectively evaluated the predictive value of positron emission tomography using fluorine-18 fluorodeoxyglucose (FDG-PET) for in vivo testing of chemosensitivity in locally advanced gastric cancer using an a priori definition of metabolic response (a decrease of >35% of the standard uptake value). The goal of the study was the definition of biologically different groups of patients prior to or early during induction therapy, with special emphasis on FDG non-avid tumors. EXPERIMENTAL DESIGN: Based on our data, which was published in 2003, at least 36 patients with metabolic response or FDG non-avid tumors had to be recruited for an analysis of the group of FDG non-avid tumors with sufficient statistical power. Seventy-one patients (32 metabolic nonresponders, 17 metabolic responders, and 22 patients with FDG non-avid tumors) underwent FDG-PET at baseline. In FDG-avid tumors, FDG-PET was repeated 14 days after the initiation of chemotherapy. RESULTS: Metabolic responders (17 of 49) showed a high histopathologic response rate (69%) and a favorable prognosis (median survival not reached), whereas metabolic nonresponders (32 of 49) had a poor prognosis (median survival, 24.1 months) and showed a histopathologic response in 17%. The histopathologic response rate (24%) for FDG-PET non-avid patients showed no significant difference compared with FDG-avid nonresponders (P=0.72). Survival of FDG non-avid patients was 36.7 months (not significantly different from FDG-avid nonresponders, 24.1 months, P=0.46). CONCLUSION: In locally advanced gastric cancer, three different metabolic groups exist. Response and survival was predicted by PET in FDG-avid tumors. Metabolic response assessment was not possible in FDG non-avid tumors; however, due to unfavorable outcome, therapy modification might also be considered in FDG non-avid tumors.
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Resistencia a Antineoplásicos , Fluorodesoxiglucosa F18 , Tomografía de Emisión de Positrones , Radiofármacos , Neoplasias Gástricas/diagnóstico por imagen , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Femenino , Fluorodesoxiglucosa F18/metabolismo , Humanos , Estimación de Kaplan-Meier , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Pronóstico , Estudios Prospectivos , Radiofármacos/metabolismo , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/mortalidad , TiempoRESUMEN
OBJECTIVE: To study the impact of induction chemotherapy on surgical risk and outcome in locally advanced Barrett cancer. BACKGROUND: Induction chemotherapy has become an accepted choice for the treatment of locally advanced adenocarcinoma of the esophagus and the esophagogastric junction. It has been shown that early assessment of metabolic response using positron emission tomography predicts response to chemotherapy. Metabolic response has also been revealed to be an independent prognostic factor. METHODS: Surgical risk and outcome in metabolic responders were compared with those in nonresponders. The study design predefined a 12-week multicourse preoperative chemotherapy regimen in metabolic responders. In contrast, chemotherapy was stopped after a 2-week induction period in metabolic nonresponders. All patients were scheduled for surgical resection. RESULTS: Of 110 evaluable patients, 50 metabolic responders and 54 nonresponders underwent resection. Postoperative complications occurred in 34%. Two patients (1.8%) died. There were no significant differences between responders and nonresponders in terms of postoperative morbidity and mortality. Major histologic remissions were seen in 58% of metabolic responders. Metabolic responders had an increased chance of having an R0 resection (96% vs. 74%; P=0.002) and a decreased risk of developing hematogenous or distant lymphatic recurrence (32% vs. 54%, P=0.019). This translated into better recurrence-free and overall survival. CONCLUSIONS: Induction chemotherapy and early metabolic response assessment is a new concept in the treatment of locally advanced Barrett cancer. Metabolic responders undergoing multicourse preoperative chemotherapy have a good prognosis. The best treatment strategy for nonresponders remains to be defined.
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Adenocarcinoma/cirugía , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Esófago de Barrett/cirugía , Neoplasias Esofágicas/cirugía , Terapia Neoadyuvante , Adenocarcinoma/tratamiento farmacológico , Adenocarcinoma/metabolismo , Esófago de Barrett/tratamiento farmacológico , Esófago de Barrett/metabolismo , Quimioterapia Adyuvante , Supervivencia sin Enfermedad , Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/metabolismo , Unión Esofagogástrica/cirugía , Fluorodesoxiglucosa F18 , Estudios de Seguimiento , Humanos , Metástasis Linfática/patología , Persona de Mediana Edad , Recurrencia Local de Neoplasia/patología , Tomografía de Emisión de Positrones , Complicaciones Posoperatorias , Estudios Prospectivos , Radiofármacos , Inducción de Remisión , Medición de Riesgo , Tasa de Supervivencia , Resultado del TratamientoRESUMEN
PURPOSE: Positron-emission-tomography with the glucose analog fluorodeoxyglucose (FDG-PET) has shown encouraging results for prediction of tumor response to chemotherapy. However, there is no consensus as to what time after initiation of therapy FDG-PET should be performed. To address this question we studied the time course of changes in tumor FDG-uptake in patients with locally advanced adenocarcinomas of the esophagogastric junction (AEG) treated with preoperative chemotherapy. METHODS: Twenty-four patients with AEG were included and underwent FDG-PET prior to therapy (PET1), 2 weeks after initiation of therapy (PET2), and preoperatively (PET3). Tumor metabolic activity was assessed by standardized uptake values (SUV) and correlated with histopathologic response and patient survival. RESULTS: Baseline tumor SUV was 8.3 +/- 3.5 and decreased to 5.0 +/- 1.8 at PET2 (p < 0.0001). At PET3 there was further decrease to 3.5 +/- 1.9 (p < 0.0001). The relative decrease of tumor FDG-uptake from PET1 to PET2 and from PET1 to PET3 were both significantly correlated with histopathologic response. Reduction of tumor SUV from PET1 to PET2 was significantly correlated with survival (p = 0.03) and there was a similar trend for changes from PET1 to PET3 (p = 0.09). In contrast, absolute SUVs did not demonstrate a significant correlation with histopathological response or patient survival at any of the studied time points. CONCLUSION: In patients with AEG, relative changes in tumor FDG uptake are better predictors for treatment outcome than absolute SUVs. Metabolic changes within the first 2 weeks of therapy are at least as efficient for prediction of histopathologic response and patient survival as later changes.
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Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/terapia , Neoplasias Esofágicas/diagnóstico por imagen , Neoplasias Esofágicas/terapia , Fluorodesoxiglucosa F18 , Tomografía de Emisión de Positrones/métodos , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pronóstico , Radiofármacos , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Resultado del TratamientoRESUMEN
BACKGROUND: In patients with locally advanced adenocarcinoma of the oesophagogastric junction (AEG), early metabolic response defined by 18-fluorodeoxyglucose-PET ([(18)F]FDG-PET) during neoadjuvant chemotherapy is predictive of histopathological response and survival. We aimed to assess the feasibility of a PET-response-guided treatment algorithm and its potential effect on prognosis. METHODS: Between May 27, 2002, and Aug 4, 2005, 119 patients with locally advanced adenocarcinoma of AEG type 1 (distal oesophageal adenocarcinoma) or type 2 (gastric cardia adenocarcinoma) were recruited into this prospective, single-centre study. All patients were assigned to 2 weeks of platinum and fluorouracil-based induction chemotherapy (evaluation period). Those with decreases in tumour glucose standard uptake values (SUVs), predefined as decreases of 35% or more at the end of the evaluation period and measured by PET, were defined as metabolic responders. Responders continued to receive neoadjuvant chemotherapy of folinic acid and fluorouracil plus cisplatin, or folinic acid and fluorouracil plus cisplatin and paclitaxel, or folinic acid and fluorouracil plus oxaliplatin for 12 weeks and then proceeded to surgery. Metabolic non-responders discontinued chemotherapy after the 2-week evaluation period and proceeded to surgery. The primary endpoint was median overall survival of metabolic responders and non-responders. Secondary endpoints were median event-free survival, postoperative complications and mortality, number of residual tumour-free (R0) resections, and histopathological responses. This study has been registered in the European Clinical Trials Database (EudraCT) as trial 2007-003356-11. FINDINGS: 110 patients were evaluable for metabolic responses. 54 of these patients had metabolic responses (ie, decrease of 35% or more in tumour glucose SUV) after 2 weeks of induction chemotherapy, corresponding to a response of 49% (95% CI 39-59). 104 patients had tumour resection (50 in the responder group and 54 in the non-responder group). After a median follow-up of 2.3 years (IQR 1.7-3.0), median overall survival was not reached in metabolic responders, whereas median overall survival was 25.8 months (19.4-32.2) in non-responders (HR 2.13 [1.14-3.99, p=0.015). Median event-free survival was 29.7 months (95% CI 23.6-35.7) in metabolic responders and 14.1 months (7.5-20.6) in non-responders (hazard ratio [HR] 2.18 [1.32-3.62], p=0.002). Major histological remissions (<10% residual tumour) were noted in 29 of 50 metabolic responders (58% [95% CI 48-67]), but no histological response was noted in metabolic non-responders. INTERPRETATION: This study confirmed prospectively the usefulness of early metabolic response evaluation, and shows the feasibility of a PET-guided treatment algorithm. These findings might enable tailoring of multimodal treatment in accordance with individual tumour biology in future randomised trials.
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Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/terapia , Neoplasias Esofágicas/diagnóstico por imagen , Neoplasias Esofágicas/terapia , Unión Esofagogástrica , Tomografía de Emisión de Positrones , Anciano , Algoritmos , Protocolos de Quimioterapia Combinada Antineoplásica , Terapia Combinada , Estudios de Factibilidad , Femenino , Fluorodesoxiglucosa F18 , Humanos , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante , Pronóstico , Tasa de SupervivenciaRESUMEN
Nickel, chromium, and cobalt released from stainless steel and CoCrMo alloys have been postulated to trigger hypersensitivity reactions. The objective of this study was to assess the ion release from a CoCrMo alloy and stainless steel in vitro and the cutaneous reactivity to it by patch test. 52 metal-allergic patients and 48 non-allergic controls were patch tested to stainless steel and CoCrMo discs. In addition, using atomic absorption spectrometry, the release of nickel, cobalt, and chromium from both materials was assessed upon 2-day exposure to distilled water, artificial sweat (AS), and cell culture medium. There was low nickel ion release from stainless steel (0.3-0.46 microg/cm(2)/2 days) and CoCrMo discs (up to 0.33 microg/cm(2)/2 days) into the different elution media. Chromium release from the 2 materials was also very low (0.06-0.38 microg/cm(2)/2 days from stainless steel and 0.52-1.36 microg/cm(2)/2 days from CoCrMo alloy). In contrast, AS led to abundant cobalt release (maximally 18.94 microg/cm(2)/2 days) from the CoCrMo discs, with concomitant eczematous reaction upon patch testing: 0 of the 52 metal-allergic patients reacted to stainless steel discs and 5 of the 52 patients to CoCrMo discs (all 5 patients were cobalt allergic and 3 also nickel and chromium allergic). None of the controls reacted to the discs. Apart from nickel being a focus of allergological research, our results point to the possibly underestimated association of cobalt release and potential hyperreactivity to CoCrMo alloy.
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Cromo/efectos adversos , Cobalto/efectos adversos , Dermatitis Alérgica por Contacto/etiología , Níquel/efectos adversos , Acero Inoxidable/efectos adversos , Adulto , Anciano , Aleaciones/química , Cromo/análisis , Cobalto/análisis , Medios de Cultivo , Femenino , Humanos , Masculino , Persona de Mediana Edad , Níquel/análisis , Pruebas del Parche , Espectrofotometría Atómica , Acero Inoxidable/química , SudorRESUMEN
Medical devices manufactured for implantation into humans must be free of any contamination with viable bacteria. However, remnants of dead bacteria and bacterial components alone may induce an inflammatory immune response. Pyrogen tests for such inflammatory contaminations are generally performed either by determining the content of lipopolysaccharide in rinsing solutions of batch samples by limulus amoebocyte lysate assay, by injecting the rinsing solutions into rabbits or by implanting batch samples into rabbits and measuring change of body temperature. In this study, we show that the in vitro pyrogen test (IPT), which measures the release of the inflammatory cytokine IL-1beta in fresh or cryopreserved human whole blood, can be used to assess the pyrogenic contamination of implantable medical devices. This test was used to check neurosurgical implants, namely aneurysm clips, as a proof of principle. Owing to the direct contact of the test material with the blood cells, this test does not require rinsing procedures, which have variable efficacy. The use of human blood ensures the detection of all substances that are pyrogenic for humans and reflects their relative potency. The safety of the products as delivered could be confirmed. The effects of sterilization and depyrogenization procedures on intentional pyrogenic contaminations of samples could be followed. This new application of the already internationally validated method promises to replace further rabbit pyrogen tests. It generates extremely sensitive results with an extended range of detectable pyrogenic contaminants.
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Equipos y Suministros/microbiología , Prótesis e Implantes/microbiología , Pirógenos/análisis , Equipos y Suministros/normas , Humanos , Interleucina-1beta/sangre , Métodos , Técnicas Microbiológicas/métodos , Prótesis e Implantes/normas , Esterilización , Instrumentos Quirúrgicos/microbiologíaRESUMEN
PURPOSE: A previous study suggested that measurement of therapy-induced changes in tumor glucose metabolism by positron emission tomography (PET) with the glucose analog [18F]fluorodeoxyglucose (FDG) allows to select patients most likely to benefit from preoperative chemotherapy in adenocarcinomas of the esophagogastric junction (AEG). The aim of this study was to prospectively validate these findings by using an a priori definition of metabolic response. PATIENTS AND METHODS: Sixty-five patients with locally advanced AEGs were included. Tumor glucose utilization was quantitatively assessed by FDG-PET before chemotherapy and 14 days after initiation of therapy. Patients were classified as metabolic responders when the metabolic activity of the primary tumor had decreased by more than 35% at the time of the second PET. RESULTS: Metabolic responders showed a high histopathologic response rate (44%) with a 3-year survival rate of 70%. In contrast, prognosis was poor for metabolic nonresponders with a histopathologic response rate of 5% (P = .001) and a 3-year survival rate of 35% (P = .01). A multivariate analysis (covariates: ypT-, ypN-category, histopathologic response) demonstrated that metabolic response was the only factor predicting recurrence (P = .018) in the subgroup of completely resected (R0) patients. CONCLUSION: This study prospectively demonstrates that changes in tumor metabolic activity during chemotherapy predict response, prognosis, and recurrence. These data provide the basis for clinical trials in which preoperative treatment is changed for patients without a metabolic response early in the course of therapy. PET-guided induction therapy may even be applicable to earlier tumor stages because surgery is only minimally delayed in nonresponding patients.
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Adenocarcinoma/diagnóstico por imagen , Adenocarcinoma/metabolismo , Adenocarcinoma/patología , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/patología , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patología , Anciano , Neoplasias Esofágicas/diagnóstico por imagen , Femenino , Fluorodesoxiglucosa F18 , Glucosa/metabolismo , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Terapia Neoadyuvante , Recurrencia Local de Neoplasia , Estadificación de Neoplasias/métodos , Selección de Paciente , Tomografía de Emisión de Positrones , Valor Predictivo de las Pruebas , Pronóstico , Estudios Prospectivos , Radiofármacos , Neoplasias Gástricas/diagnóstico por imagen , Análisis de SupervivenciaRESUMEN
We evaluated DNA polymorphisms in the thymidylate synthase (TS) and 5,10-methylene-tetrahydrofolate reductase (MTHFR) genes for an association with response and survival in locally advanced gastric cancer treated with 5-FU based preoperative chemotherapy (CTx). DNA of 238 patients (CTx-group: total n = 135, completely resected (R0) n = 102; without CTx: R0 n = 103) was isolated from blood or from nontumorous tissues. In the CTx-group, genotyping of the tandem repeat and the G/C polymorphism in the triple repeat in the promoter region of the TS gene and of the C677T polymorphism of the MTHFR gene was performed. None of the TS or MTHFR genotypes were associated with histopathological response and only the TS tandem repeat polymorphism was significantly related to survival (all patients n = 135, p = 0.002; R0 resected patients n = 102, p = 0.007; log-rank test). Multivariate analysis revealed ypN (p < 0.001) and the TS tandem repeat polymorphism as independent prognostic factors in the CTx-R0-group (p = 0.003). Analyzing the prognostic significance of the TS polymorphisms in the R0-group without CTx, TS genotypes were not significantly associated with survival. Comparing survival between R0 patients with and without CTx in the respective TS genotype groups of the tandem repeat polymorphism, a significant survival benefit for the patients with CTx was found for the 2rpt/2rpt (n = 49; p = 0.002) and 2rpt/3rpt genotypes (n = 99; p = 0.004), but not for the 3rpt/3rpt genotype (n = 57; p = 0.93). Patients' survival after CTx was associated with the TS tandem repeat polymorphism. CTx did not improve survival of patients with the 3rpt/3rpt genotype. Thus, a different therapy might be more appropriate for these patients.
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Polimorfismo de Nucleótido Simple/genética , Regiones Promotoras Genéticas/genética , Secuencias Repetidas en Tándem/genética , Timidilato Sintasa/genética , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Frecuencia de los Genes , Genotipo , Humanos , Masculino , Metilenotetrahidrofolato Reductasa (NADPH2)/genética , Persona de Mediana Edad , Análisis Multivariante , Terapia Neoadyuvante , Pronóstico , Neoplasias Gástricas/genética , Neoplasias Gástricas/patología , Neoplasias Gástricas/terapia , Análisis de Supervivencia , Resultado del TratamientoRESUMEN
BACKGROUND: The objectives of this study were to investigate histomorphologic features as a response classification after neoadjuvant radiochemotherapy (RTx/CTx) and to correlate the results with clinical outcome parameters (e.g., postoperative morbidity and mortality, recurrence, and survival) in patients with locally advanced esophageal squamous cell carcinoma (ESCC). METHODS: Three hundred eleven patients with histologically proven, locally advanced, intrathoracic ESCC (clinical T3 or T4, N0-N+, M0) located at or above the level of the tracheal bifurcation underwent preoperative, combined, simultaneous RTx/CTx followed by esophagectomy. Response to RTx/CTx was classified by the quantification of residual tumor cells. A histopathologic response was defined as <10% residual tumor cells found within the specimen compared with a histopathologic nonresponse, which was characterized by >10% residual tumor cells. RESULTS: A histopathologic response was correlated significantly with complete tumor resection status (R0 resection) (P .0001), histopathologic tumor (ypT) category (P <.0001), lymph node involvement (P <.0001), lymphatic vessel invasion (P <.001), and survival (P <.0001). A multivariate Cox regression analysis revealed that histopathologic response classification according to the percentage of residual tumor cells was an independent prognostic factor (P <.0001). Nonresponders had greater postoperative pulmonary morbidity (P = .01), a greater 30-day mortality rate (P = .02), and a dismal survival rate compared to histopathologic responders (P <.0001). CONCLUSIONS: Histopathologic response evaluation based on the quantification of residual tumor cells provided meaningful information for the assessment of outcomes among patients with ESCC who have underwent neoadjuvant RTx/CTx. The current results indicated that histopathologic responders may represent a subgroup of patients who benefit from neoadjuvant therapy followed by surgery.
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Carcinoma de Células Escamosas/patología , Carcinoma de Células Escamosas/terapia , Neoplasias Esofágicas/patología , Neoplasias Esofágicas/terapia , Neoplasia Residual/mortalidad , Neoplasia Residual/patología , Anciano , Biopsia con Aguja , Carcinoma de Células Escamosas/mortalidad , Quimioterapia Adyuvante , Estudios de Cohortes , Terapia Combinada , Supervivencia sin Enfermedad , Neoplasias Esofágicas/mortalidad , Esofagectomía/métodos , Estudios de Evaluación como Asunto , Femenino , Humanos , Inmunohistoquímica , Masculino , Persona de Mediana Edad , Análisis Multivariante , Estadificación de Neoplasias , Probabilidad , Pronóstico , Modelos de Riesgos Proporcionales , Radioterapia Adyuvante , Sensibilidad y Especificidad , Análisis de Supervivencia , Resultado del TratamientoRESUMEN
Small bowel adenocarcinoma (SB-AC) is a very rare tumor entity. Epigenetic alterations, including hypermethylation of DNA mismatch repair genes and tumor suppressor genes, seem to be important for carcinogenesis in tumors of the gastrointestinal tract, but have not yet been investigated in SB-AC. In the current study, the prevalence of hypermethylation in a panel of genes involved in gastrointestinal carcinogenesis (hMLH1, HPP1, p14(ARF), p16(INK4A), APC) was determined in a series of SB-AC. Paraffin-embedded tumor samples from 56 patients with SB-AC who underwent surgical resection between January 1985 and December 2003 were investigated for hypermethylation by means of methylation-specific real-time PCR, and compared with our findings in a previously investigated series of 50 gastric adenocarcinomas. In comparison with adenocarcinomas of the stomach, SB-AC revealed a significantly higher rate of hypermethylation of HPP1 (86% versus 54%, p = 0.0003), p16(INK4A) (32% versus 10%, p = 0.0006), and a significantly lower rate of hypermethylation of APC (48% versus 84%, p = 0.0001). Hypermethylation of hMLH1 and p14(ARF) was present in 23% and 9% of SB-AC, respectively. Locally advanced tumor categories (pT3/4) showed a higher rate of hypermethylation of HPP1 (90%) than did early tumor categories (pT1/2 categories, 40%; p = 0.0036). This was also reflected by the correlation between the HPP1 hypermethylation and high UICC stage (p = 0.02). No correlation was found between hypermethylation and other clinicopathologic parameters such as age, tumor grade and nodal status. Our findings suggest that hypermethylation of hMLH1, HPP1, p16(INK4A) and APC is frequent in primary adenocarcinomas of the small bowel. The differences in the hypermethylation spectrum of small bowel and stomach cancer indicate significant epigenetic differences between these tumors.
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Adenocarcinoma/genética , Metilación de ADN , Neoplasias Intestinales/genética , Intestino Delgado/patología , Proteínas de Neoplasias/genética , Proteínas Adaptadoras Transductoras de Señales , Proteína de la Poliposis Adenomatosa del Colon/genética , Adulto , Anciano , Anciano de 80 o más Años , Proteínas Portadoras/genética , Inhibidor p16 de la Quinasa Dependiente de Ciclina/genética , ADN de Neoplasias/genética , Femenino , Humanos , Masculino , Proteínas de la Membrana/genética , Persona de Mediana Edad , Homólogo 1 de la Proteína MutL , Proteínas Nucleares/genética , Proteína p14ARF Supresora de Tumor/genéticaRESUMEN
PURPOSE: We evaluated the expression of seven therapy-related genes to predict the clinical outcome of advanced gastric cancer patients treated with a neoadjuvant chemotherapeutic protocol. EXPERIMENTAL DESIGN: Pretherapeutic, formalin-fixed, and paraffin-embedded biopsies of 61 patients, who received a 5-fluorouracil (5-FU)- and cisplatin-based chemotherapy were studied. The expressions of the 5-FU-related genes TS, DPD, and TP and of the cisplatin-related genes ERCC1, ERCC4, KU80, and GADD45A were analyzed by quantitative real-time PCR. The expression levels of single genes and of various combinations were tested for an association with response and overall survival. RESULTS: High DPD levels were more frequently found in nonresponding patients and were associated with worse survival. GADD45A and TP levels showed weak associations with response, but GADD45A expression correlated with survival. There was no association with response for TS expression, but tumors with a high TS level were associated with worse survival. The combination of GADD45A and TP revealed the strongest predictive effect. High expression values of TP and/or GADD45A were exclusively found in nonresponding patients (P = 0.002) and were associated with a significantly poorer survival (P = 0.04). CONCLUSIONS: Combined gene expression levels of TP and GADD45A represent a new variable to predict the clinical outcome after neoadjuvant chemotherapy in gastric cancer. The association of DPD expression with response and survival underlines a predominant role of DPD to predict 5-FU sensitivity. The association of TS expression levels with survival but not with response suggests an importance of this gene for tumor progression.
Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Proteínas de Ciclo Celular/genética , Regulación Neoplásica de la Expresión Génica/efectos de los fármacos , Proteínas Nucleares/genética , Neoplasias Gástricas/tratamiento farmacológico , Timidina Fosforilasa/genética , Adulto , Anciano , Antígenos Nucleares/genética , Cisplatino/administración & dosificación , Proteínas de Unión al ADN/genética , Dihidrouracilo Deshidrogenasa (NADP)/genética , Endonucleasas/genética , Femenino , Fluorouracilo/administración & dosificación , Humanos , Autoantígeno Ku , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante , Valor Predictivo de las Pruebas , Pronóstico , ARN Mensajero/genética , ARN Mensajero/metabolismo , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/métodos , Neoplasias Gástricas/genética , Neoplasias Gástricas/patología , Análisis de Supervivencia , Timidilato Sintasa/genética , Resultado del TratamientoRESUMEN
PURPOSE: From 1991 to 1994 we performed a phase II study with intensive preoperative chemoradiation in locally advanced squamous cell carcinoma and adenocarcinoma of the esophagus. We now report on a multivariate analysis of prognostic factors based on the long-term results at a median follow-up of 6.5 years. PATIENTS AND METHODS: Eighty-eight patients were treated. Prognostic factors for overall survival and local tumor control were identified by univariate and multivariate analysis. RESULTS: Median overall survival reached 17 months, and the survival rate at 5 years was 22% (95%-confidence interval: 18-26%). Response to induction chemotherapy was the only independent factor predicting local tumor control and--beside weight loss prior to treatment--it also proved to be an independent prognostic factor for long-term survival. CONCLUSIONS: Intensive chemoradiation followed by surgery seems to be appropriate to improve long-term survival of high-risk patients with locally advanced esophageal cancer. In our trial, local tumor control and prognosis were best correlated with response to induction chemotherapy. These results may help to guide decisions regarding surgery in multimodal treatment of EC. Further efforts are needed to increase the number of treatment responders and to predict tumors not responding to chemo(radio)therapy earlier.
Asunto(s)
Neoplasias Esofágicas/tratamiento farmacológico , Neoplasias Esofágicas/radioterapia , Terapia Neoadyuvante , Recurrencia Local de Neoplasia/prevención & control , Adenocarcinoma/tratamiento farmacológico , Adenocarcinoma/radioterapia , Adulto , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Carcinoma de Células Escamosas/tratamiento farmacológico , Carcinoma de Células Escamosas/radioterapia , Quimioterapia Adyuvante , Neoplasias Esofágicas/cirugía , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Terapia Neoadyuvante/métodos , Valor Predictivo de las Pruebas , Pronóstico , Radioterapia Adyuvante , Inducción de Remisión , Factores de Riesgo , Análisis de Supervivencia , Resultado del TratamientoRESUMEN
PURPOSE: To evaluate the time course of therapy-induced changes in tumor glucose use during chemoradiotherapy of esophageal squamous cell carcinoma (ESCC) and to correlate the reduction of metabolic activity with histopathologic tumor response and patient survival. PATIENTS AND METHODS: Thirty-eight patients with histologically proven intrathoracic ESCC (cT3, cN0/+, cM0) scheduled to undergo a 4-week course of preoperative simultaneous chemoradiotherapy followed by esophagectomy were included. Patients underwent positron emission tomography with the glucose analog fluorodeoxyglucose (FDG-PET) before therapy (n = 38), after 2 weeks of initiation of therapy (n = 27), and preoperatively (3 to 4 weeks after chemoradiotherapy; n = 38). Tumor metabolic activity was quantitatively assessed by standardized uptake values (SUVs). Results Mean tumor FDG uptake before therapy was 9.3 +/- 2.8 SUV and decreased to 5.7 +/- 1.9 SUV 14 days after initiation of chemoradiotherapy (-38% +/- 18%; P <.0001). The preoperative scan showed an additional decrease of metabolic activity to 3.3 +/- 1.1 SUV (P <.0001). In histopathologic responders (< 10% viable cells in the resected specimen), the decrease in SUV from baseline to day 14 was 44% +/- 15%, whereas it was only 21% +/- 14% in nonresponders (P =.0055). Metabolic changes at this time point were also correlated with patient survival (P =.011). In the preoperative scan, tumor metabolic activity had decreased by 70% +/- 11% in histopathologic responders and 51% +/- 21% in histopathologic nonresponders. CONCLUSION: Changes in tumor metabolic activity after 14 days of preoperative chemoradiotherapy are significantly correlated with tumor response and patient survival. This suggests that FDG-PET might be used to identify nonresponders early during neoadjuvant chemoradiotherapy, allowing for early modifications of the treatment protocol.
Asunto(s)
Carcinoma de Células Escamosas/diagnóstico por imagen , Carcinoma de Células Escamosas/terapia , Neoplasias Esofágicas/diagnóstico por imagen , Neoplasias Esofágicas/terapia , Tomografía Computarizada de Emisión , Anciano , Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/mortalidad , Quimioterapia Adyuvante , Terapia Combinada , Supervivencia sin Enfermedad , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/mortalidad , Esofagectomía/métodos , Femenino , Fluorodesoxiglucosa F18 , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Cuidados Preoperatorios/métodos , Pronóstico , Estudios Prospectivos , Radioterapia Adyuvante , Medición de Riesgo , Sensibilidad y Especificidad , Análisis de Supervivencia , Resultado del TratamientoRESUMEN
PURPOSE: We prospectively evaluated the predictive value of therapy-induced reduction of tumor glucose use for subsequent response and patient survival in patients with gastric cancer treated by preoperative chemotherapy. PATIENTS AND METHODS: Forty-four consecutive patients with locally advanced gastric carcinomas were studied by positron emission tomography with the glucose analog fluorine-18 fluorodeoxyglucose (FDG-PET) at baseline and 14 days after initiation of cisplatin-based polychemotherapy. On the basis of a previous study, a reduction of tumor FDG uptake by more than 35% was used as a criterion for a metabolic response. The metabolic response in FDG-PET was correlated with histopathologic response after completion of therapy (< 10% viable tumor cells in the resected specimen) and patient survival. RESULTS: Thirty-five (80%) of the 44 tumors were visualized with sufficient contrast for quantitative analysis (two of 19 intestinal and seven of 25 nonintestinal tumors showed only low FDG uptake). In the 35 assessable patients, PET imaging after 14 days of therapy correctly predicted histopathologic response after 3 months of therapy in 10 (77%) of 13 responders and 19 (86%) of 22 nonresponders. Median overall survival for patients with a metabolic response has not been reached (2-year survival rate, 90%); for patients without a metabolic response, median survival was only 18.9 months (2-year survival rate, 25%; P =.002) CONCLUSION: This study prospectively demonstrates that in patients with gastric cancer, response to preoperative chemotherapy can be predicted by FDG-PET early during the course of therapy. By avoiding the morbidity and costs of ineffective therapy, FDG-PET imaging may markedly facilitate the use of preoperative chemotherapy.
Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Neoplasias Gástricas/diagnóstico por imagen , Neoplasias Gástricas/tratamiento farmacológico , Distribución de Chi-Cuadrado , Cisplatino/administración & dosificación , Femenino , Fluorodesoxiglucosa F18/metabolismo , Fluorouracilo/administración & dosificación , Humanos , Leucovorina/administración & dosificación , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Cuidados Preoperatorios , Estudios Prospectivos , Radiofármacos/metabolismo , Estadísticas no Paramétricas , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/cirugía , Tomografía Computarizada de EmisiónRESUMEN
BACKGROUND: Patients with locally advanced gastric cancer (cT3, cT4, N+, M0) have a dismal prognosis, despite complete resection. The objective of this study was to evaluate the toxicity and efficacy of neoadjuvant chemotherapy using the PLF (cisplatin/leucovorin [folinic acid]/5-fluorouracil [FU]) regimen in these patients. Primary endpoints of the study were the toxicity and the response to chemotherapy. Secondary endpoints were the rate of complete resection, survival, and first site of failure. METHODS: Forty-nine patients with adenocarcinoma of the stomach were enrolled. Staging was based on abdominal computed tomography (CT) scans, endosonography, and laparoscopy. The intention was to administer two cycles (each containing six courses) of preoperative chemotherapy, consisting of cisplatin 50 mg/m(2), high-dose folinic acid (HD-FA) 500 mg/m(2), and HD 5-FU (HD-5-FU) 2000 mg/m(2) (PLF). Following chemotherapy all patients were referred to surgery. To be evaluable for response, survival, and first site of failure, the patient had to receive at least one cycle of chemotherapy. RESULTS: Toxicity observed was low, with grade 3 toxicity in fewer than 5% of the patients and two events of grade 4 toxicity (diarrhea and pulmonary embolism). Forty-two of the patients (86%) received at least one cycle of chemotherapy. The clinical response rate in these patients was 26% (11/42 patients). In 76% of the patients (32/42), a complete resection was possible. The median duration of follow-up for the surviving patients was 58 months (range, 38 to 80+ months). The median survival time for the 42 patients assessable for response was 25.4 months (range, 6 to 80+ months). After complete resection, median survival time was 32 months (range, 7.6 to 80+ months). The median survival time for clinically responding patients has not yet been determined, but 5-year survival is 90%. Twenty of the 32 completely resected patients (62.5%) had recurrences. First site of failure was peritoneal dissemination in 10 patients; locoregional and distant recurrences were rare. CONCLUSION: Neoadjuvant chemotherapy with PLF in patients with locally advanced gastric cancer has low toxicity and reasonable efficacy, allowing administration on an outpatient basis. Clinically responding patients have an excellent outcome after complete resection. The development of peritoneal dissemination even after neoadjuvant chemotherapy and complete resection remains an unsolved problem in patients with nonintestinal type tumors.
Asunto(s)
Adenocarcinoma/tratamiento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Terapia Neoadyuvante , Neoplasias Gástricas/tratamiento farmacológico , Adenocarcinoma/mortalidad , Adenocarcinoma/patología , Adenocarcinoma/cirugía , Adulto , Anciano , Quimioterapia Adyuvante , Cisplatino/administración & dosificación , Femenino , Fluorouracilo/administración & dosificación , Humanos , Leucovorina/administración & dosificación , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Estudios Prospectivos , Neoplasias Gástricas/mortalidad , Neoplasias Gástricas/patología , Neoplasias Gástricas/cirugía , Tasa de Supervivencia , Resultado del TratamientoRESUMEN
BACKGROUND: Neoadjuvant chemotherapy has shown some success in the treatment of gastric carcinoma, but objective parameters for measuring its effects are lacking. The authors performed the current study to determine which histomorphologic features are correlated with patient prognosis after chemotherapy. METHODS: Thirty-six patients with gastric carcinoma were treated with a combination of etoposide, doxorubicin, and cisplatin. The entire tumor beds of the specimens were evaluated histologically and compared with specimens treated with surgery alone. Thirty-four patients were available for survival analysis (follow-up period, 60-130 months). RESULTS: None of the 36 patients had complete tumor regression, 4 patients had marked regression (less than 10% viable tumor), 9 patients had regression to 10-50% remaining viable tumor, and 23 patients had more than 50% viable tumor remaining. Currently, 9 patients are still alive (5-year survival rate, 27%). Tumor regression was found to be correlated significantly with survival (P = 0.01), but tumor size (P = 0.002) and lymphatic vessel invasion (P = 0.003) were better predictors of prognosis. CONCLUSIONS: Histologic tumor regression grade is an objective measure of the effects of neoadjuvant chemotherapy in patients with gastric carcinoma, but its accuracy may be improved by adding additional staging variables such as tumor size and lymphatic vessel involvement. Cancer 2003;98:1521-30.
Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Carcinoma/tratamiento farmacológico , Carcinoma/patología , Neoplasias Gástricas/tratamiento farmacológico , Neoplasias Gástricas/patología , Adulto , Anciano , Análisis de Varianza , Biopsia con Aguja , Carcinoma/mortalidad , Carcinoma/cirugía , Quimioterapia Adyuvante , Cisplatino/uso terapéutico , Supervivencia sin Enfermedad , Doxorrubicina/uso terapéutico , Etopósido/uso terapéutico , Femenino , Gastrectomía/métodos , Mucosa Gástrica/efectos de los fármacos , Mucosa Gástrica/patología , Humanos , Inmunohistoquímica , Masculino , Persona de Mediana Edad , Terapia Neoadyuvante , Estadificación de Neoplasias , Probabilidad , Pronóstico , Medición de Riesgo , Neoplasias Gástricas/mortalidad , Neoplasias Gástricas/cirugía , Análisis de Supervivencia , Resultado del TratamientoRESUMEN
Adenocarcinomas of the esophagogastric junction (AEG) are now recognized as a separate tumor entity with increasing incidence. The aim of the present study was to evaluate whether positron emission tomography (PET) using the glucose analog F-18-fluorodeoxyglucose (FDG) can be used for metabolic characterization of this tumor type. Fifty-two patients with histologically proven, locally advanced AEG (distal esophagus, type I: n = 31; cardia, type II: n = 21) were studied by FDG-PET. None of the tumors had been previously treated. Findings of endoscopy (growth type), endoluminal ultrasound (uT, uN), computed tomography (cN, cranio-caudal extent, tumor thickness), histological evaluation (Lauren classification, tumor grade), anatomical classification, and survival were correlated with the results of FDG-PET. There was no correlation between FDG uptake and clinical stage, grade, Lauren classification, or survival. All AEG I tumors were visualized by FDG-PET with high contrast, whereas FDG uptake by five AEG II tumors (24%) did not differ from background activity. In a quantitative analysis, mean FDG uptake of AEG I tumors was 1.6 times higher than that of AEG II tumors ( p = 0.0005). PET can be used to visualize type I adenocarcinomas of the esophagogastric junction (AEG I). In AEG II tumors, however, the use of FDG-PET appears to be limited. The significantly higher FDG uptake of AEG I tumors compared to AEG II tumors suggests that these two tumor types differ in glucose utilization. This finding strengthens the hypothesis that AEG I and AEG II are two different tumor entities.