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Resumen OBJETIVO: Identificar micrometástasis ganglionares en neoplasias malignas ginecológicas, y las características histopatológicas y clínicas asociadas con los hallazgos. MATERIALES Y MÉTODOS: Estudio observacional, descriptivo y retrospectivo efectuado en pacientes con uno o más ganglios con micrometástasis identificados en cirugías primarias etapificadoras por cáncer de endometrio, ovario o cervicouterino, linfadenectomía sistemática o ganglio centinela, atendidas en el Hospital de Ginecoobstetricia Dr. Luis Castelazo Ayala, de enero de 2014 a diciembre de 2018. Criterios de exclusión: ausencia micrometástasis ganglionares. Criterios de eliminación: información incompleta en el expediente clínico, sin seguimiento y falta de evidencia patológica de micrometástasis ganglionar. Variables de estudio: identificación de ganglios con micrometástasis, diagnóstico de cáncer ginecológico por tratamiento quirúrgico y tasa de supervivencia. Para la revisión bibliográfica se consultó la base de datos de PubMed, con MeSH o palabras clave: "micrometástasis ganglionares" y "cáncer de ovario"; "cáncer de endometrio", "cáncer cervicouterino" y "cáncer ginecológico con micrometástasis". RESULTADOS: Se registraron 11 casos de micrometástasis ganglionares, de un total de 433 con cáncer de ovario, endometrio o cervicouterino. No se aplicaron pruebas estadísticas por lo limitado de la muestra. En todos los casos se identificó, mínimo, un ganglio con micrometástasis, con ganglio centinela o linfadenectomía sistemática. Todas las pacientes recibieron tratamiento coadyuvante. CONCLUSIONES: Es importante efectuar la identificación de micrometástasis en linfadenectomías sistemáticas mediante la tinción con hematoxilina-eosina (es la metodología más accesible y económica para el sistema público de salud de México) o búsqueda de ganglio centinela, con la finalidad de determinar la frecuencia en población mexicana y establecer la etapa patológica real de la enfermedad.
Abstract OBJECTIVE: To identify lymph node micrometastases in malignant gynecological neoplasms and their histopathological and clinical characteristics associated with the findings. MATERIALS AND METHODS: Observational, descriptive and retrospective study performed in patients with one or more lymph nodes with micrometastases in primary stage surgery for endometrial, ovarian or cervical cancer, systematic lymphadenectomy or sentinel node, attended at the Hospital de Ginecoobstetricia 4 Dr. Luis Castelazo Ayala, from January 2014 to December 2018. Exclusion criteria: no ganglion micrometastases. Elimination criteria: incomplete information in the clinical file, without follow-up and lack of pathological evidence of lymph node micrometastasis. The variables to be considered were: identification of lymph nodes with micrometastases, diagnosis of gynecological cancer by surgical treatment and survival rate. For the literature review, the PubMed database was consulted, with key words such as "ganglionic micrometastases" and "ovarian cancer", "endometrial cancer", "cervical cancer" and "gynecological cancer with micrometastasis". RESULTS: There were 11 cases of lymph node micrometastases, of a total of 433 with ovarian, endometrial or cervical cancer. No statistical tests were applied because of the limited sample. In all cases, a lymph node with micrometastasis, with a sentinel lymph node or systematic lymphadenectomy was identified. All patients received coadjuvant treatment. CONCLUSIONS: It is important to identify micrometastases in systematic lymphadenectomy by staining with haematoxylin-eosin (the most accessible and economical methodology for the public health system in Mexico) or sentinel lymph node search, in order to determine the frequency in the Mexican population and establish the actual pathological stage of the disease.
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Objective To evaluate the prognostic impact of a wide spectrum of pathologic parameters in a consecutive series of homogenously treated and well-characterized patients with stage Ⅰ and Ⅱ colorectal cancer, and to investigate the prognostic value of lymph node occult disease (micrometastasis) in disease-free survival rate detected by immunohistochemistry with epithelial membrane antigen and carcinoembryonic antigen. Methods The study included 126 patients operated on by a single surgeon for stage Ⅰ and Ⅱ colorectal tumors. The postoperative follow-up was performed for 64 to 106 months. At least 10 lymph nodes were harvested and examined in all the specimens. The prognostic value of 10 pathologic parameters, including lymph node occult disease (micrometastasis) detected by immunohistochemistry was investigated. Results Multivariate analysis identified lymphatic vessel invasion (absent or present;P=0.009) in lymph node positive and negative by immunohistochemistry. The five-year disease-free survival rates were 78.7%, 65.5% and 43.8% for the lymph node negative, isolated tumor cells and micrometastasis groups, respectively. There was significant difference between the lymph node negative and micrometastasis groups (P=0.005). However, the difference between the lymph node negative and isolated tumor cells groups was not statistically significant (P=0.144). Conclusions We propose that for patients found micrometastasis in lymph node with high-risk stage Ⅰ and Ⅱ colorectal cancer, adjuvant therapies are justified and effective.
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Objective: To investigate the relationship of nm23 and VEGF expression with hilar lymph node micrometastasis and the prognosis of stage Ⅰ non-small cell lung cancer (NSCLC). Methods: Immunohisto-chemistry was used to detect nm23 and VEGF protein expression in primary cancer tissue and cytokeratins in 86 hilar lymph nodes from 40 patients with stage Ⅰ NSCLC. Kaplan-meier method and Log rank test were used to analyze the 5-year survival. Results: The rate of positive hilar lymph node micrometastasis was 12.5% for stage Ⅰ NSCLC. Lymph node micrometastasis was not statistically correlated with gender, age, histologic type, differentiation, primary tumor size or VEGF protein expression (P>0.05). But it was reversely associated with nm23 protein expression in primary cancer tissue of NSCLC (P<0.05). The 5-year overall survival of pa-tients with well-differentiated NSCLC, positive nm23 expression and negative lymph node micrometastasis was better than those with moderately and poorly differentiated NSCLC, negative nm23 expression and posi-tive lymph node micrometastasis (P<0.05). Lymph node micrometastasis and nm23 protein expression were identified as two independent prognostic factors for stage Ⅰ NSCLC by univariate Cox regression analysis.Conclusion: nm23 protein expression in pdmary cancer tissue of stage Ⅰ NSCLC is closely associated with hi-lar lymph node micrometastasis, nm23 protein and hilar lymph node micrometastasis are two independent prognostic factors for stage Ⅰ NSCLC. Patients with nm23 protein deletion and positive lymph node microme-tastasis have a poor prognosis.
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Lymph node metastasis is a main route of metastasis for rectal cancer,and skip metastasis is an im portant characteristic.Many cases were found metastasis or micrometastasis in lateral or upper lymph node before the definite metastasis in mesenterium lymph node.To exactly check and diagnose the lymphnode metastasis can help manage CLIN,and influence the prognosis.In reeent years,progress has achieved in the study of lymphnode micrometestasis,and it is really a promotion for the management of rectal cancer.
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Objective To evaluate the impact of pathologic parameters and lymphatic mierometastasis on 5-year disease-frtee survival in patients with stages Ⅰ and Ⅱ colorectal cancer.Methods Surgical operation was performed in 126 patients with stage Ⅰ and Ⅱ colorectal cancer.Sixteen (range,10-28)lymph nodes were harvested in each specimen and immunohistochemical staning was performed. Theimpact of pathologic parameters and lymphatic micrometastases in survival was estimated by KaplanMeier.Results The mean follow up time was 64.11 (range,64-106) months. Multivariate analysisrevealed that lymphatic vessel invasion and depth of tumor invasion were correlated with positive CEA in lymph node,and unrelated with clinical pathologic factors.There was no significant difference between pathologic parameters and five year disease-free survival rates. The five-year diseasse-free survival rates was 75.4 percent in CEA negative patients,68.2 percent in patients with isolated tumor cells,and 46.2 percent in patients positive for micrometastasis.There was no significant difference in 5 year disease-free survival between CEA negative patients and patients with isolated tumor cells (P=0.245).However,the5-year disease-free survival was lower in patients positive for micrometastases compared to CEA negativepatients (P=0.003).Conclusions The presence of micrometastases in patients with stages Ⅰ and Ⅱ colorectal cancer may result in poor prognosis and high recurrence,and adjuvant chemotherapy will bejustified and effective.
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Objective To investigate the lymph node micrometastasis and its clinicopathologic features on 5-year disease free survival rate for patients with pT1-3N0 gastric cancer.Methods One hundred and twenty patients with stage pT1-3N0 gastric tumors were included,and 2 106 lymph nodes were harvested and examined in all the specimens.There were 9-28 lymph nodes with average 18 lymph nodes from each patient.All the lymph nodes were negative by HE staining.The CK20 expression of lymph nodes was tested by immunohistochemistry.The relationships between clinicopathologic features or CK positive expression and 5-year disease free survival were analyzed.Results The positive expression rate of CK20 was 9.07%(191/2 106)in lymph nodes and 26.67%(32/120)in patients with pT1-3N0 gastric cancer by immunohistochemistry.Eleven cases were with micriometastasis,21 cases were isolated tumor cells(ITC).The average postoperative follow-up was 66.35(range 24-121)months.Five-year disease free survival rates were 87.4%,78.3%,and 40.9% for the lymph node negative,ITC,and micrometastasis groups,respectively.Five-year disease free survival rate in the micrometastasis group was lower than that in the lymph node negative group(P=0.000)and ITC group(P=0.046).However,there was no significant difference between the lymph node negative group and ITC group(P=0.253).Multivariate analysis identified tumor diameter(P=0.011),depth of tumor invasion(P=0.043),and lymphatic vessel invasion(P=0.002)were related with CK20 positive expression.There was no significant relationship between the pathologic parameters and the 5-year disease free survival rates.Lymph node micrometastasis of gastric cancer was detected in 11 patients who should belong to stage pN1(Mi),the restage rate was 9.17%.While the lymph node negative(88 patients)and ITC(21 patients)were recorded pN0(i-)and pN0(i+),respectively,and were not recommended restage(stage pN0).Conclusion Patients with stage pT1-3N0 gastric cancer and micrometastasis in lymph node are with high-risk and low 5-year disease free survival rate,for whom adjuvant therapies may be justified and effective.
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PURPOSE: The purpose of this study is to identify immunohistochemical evidence of lymph-node micrometastasis in histologic node-negative gastric cancer patients and to evaluate the prognostic significance of lymph-node micrometastasis. MATERIALS AND METHODS: A retrospective study of 50 gastric cancer patients who underwent curative resections from October 1990 to November 1994 was performed. Two consecutive sections were prepared: one for ordinary hematoxylin and eosin staining, and the other for immunohistochemical staining with Pan cytokeratin antibody (Novocastra, UK). In the univariate analysis, the survival rate was calculated using the Life Table Method, and the multivariate analysis was determined using a Cox Proportional Hazards Model. The statistical analyses of the relationships between the clinicopathologic factors and micrometastases were performed by using a Chi-square test. RESULTS: Of 2522 harvested lymph nodes, 81 (4.1%) nodes and 19 (38%) of 50 patients were identified as having lymph- node micrometastases by using immunohistochemical staining for cytokeratin. The incidence of lymph-node micrometastases was significantly higher in diffuse type carcinomas (54%, P=0.024) and in patients with serosal invasion (52.2%, P=0.05). For patients with lymph-node micrometastases (n=19), the 5-year survival rate was significantly decreased (73.7%, P=0.015). The Lauren's classification (P= 0.021) and the depth of invasion (P=0.035) were shown by multivariate analysis to have a significant relationship with the presence of micrometastases. Multivariate analysis revealed that lymph-node micrometastasis was independently correlated with survival in histologic node-negative gastric cancer patients. CONCLUSION: The presence of cytokeratin detected lymph-node micrometastases correlates with the worse prognosis for patients with histologic node-negative gastric cancer.