To evaluate the prognostic value of site-specific metastases among patients with metastatic pancreatic carcinoma registered within the Surveillance, Epidemiology and End Results (SEER) database.METHODSSEER database (2...To evaluate the prognostic value of site-specific metastases among patients with metastatic pancreatic carcinoma registered within the Surveillance, Epidemiology and End Results (SEER) database.METHODSSEER database (2010-2013) has been queried through SEER*Stat program to determine the presentation, treatment outcomes and prognostic outcomes of metastatic pancreatic adenocarcinoma according to the site of metastasis. In this study, metastatic pancreatic adenocarcinoma patients were classified according to the site of metastases (liver, lung, bone, brain and distant lymph nodes). We utilized chi-square test to compare the clinicopathological characteristics among different sites of metastases. We used Kaplan-Meier analysis and log-rank testing for survival comparisons. We employed Cox proportional model to perform multivariate analyses of the patient population; and accordingly hazard ratios with corresponding 95%CI were generated. Statistical significance was considered if a two-tailed P value < 0.05 was achieved.RESULTSA total of 13233 patients with stage IV pancreatic cancer and known sites of distant metastases were identified in the period from 2010-2013 and they were included into the current analysis. Patients with isolated distant nodal involvement or lung metastases have better overall and pancreatic cancer-specific survival compared to patients with isolated liver metastases (for overall survival: lung vs liver metastases: P < 0.0001; distant nodal vs liver metastases: P < 0.0001) (for pancreatic cancer-specific survival: lung vs liver metastases: P < 0.0001; distant nodal vs liver metastases: P < 0.0001). Multivariate analysis revealed that age < 65 years, white race, being married, female gender; surgery to the primary tumor and surgery to the metastatic disease were associated with better overall survival and pancreatic cancer-specific survival.CONCLUSIONPancreatic adenocarcinoma patients with isolated liver metastases have worse outcomes compared to patients with isolated lung or distant nodal metastases. Further research is needed to identify the highly selected subset of patients who may benefit from local treatment of the primary tumor and/or metastatic disease.展开更多
Objective: To establish a nude mice model of human osteosarcoma lung metastasis. Methods: The growth of human osteosarcoma cell sublines M8 and M6 was determined by MTT assay. 2 × 107 cells were injected into the...Objective: To establish a nude mice model of human osteosarcoma lung metastasis. Methods: The growth of human osteosarcoma cell sublines M8 and M6 was determined by MTT assay. 2 × 107 cells were injected into the tail vein of nude mice. Mice were sacrificed started on week 4 after injection, and lung metastases were evaluated under both mac-roscopic and microscopic observation with HE staining. Results: The growth of low-metastatic subline M6 was lower than high-metastatic sublines M8. Seventeen mice after injected M8 had occurred lung metastases while only one mice had oc-curred in M6 group. Moreover, M8 cells within metastases were arrangement disorder with variable nuclear hyperchromasia. Conclusion: A mouse model for human osteosarcoma cancer lung metastasis can be established by injection different ability of metastasis MG63 cells into tail vein.展开更多
文摘To evaluate the prognostic value of site-specific metastases among patients with metastatic pancreatic carcinoma registered within the Surveillance, Epidemiology and End Results (SEER) database.METHODSSEER database (2010-2013) has been queried through SEER*Stat program to determine the presentation, treatment outcomes and prognostic outcomes of metastatic pancreatic adenocarcinoma according to the site of metastasis. In this study, metastatic pancreatic adenocarcinoma patients were classified according to the site of metastases (liver, lung, bone, brain and distant lymph nodes). We utilized chi-square test to compare the clinicopathological characteristics among different sites of metastases. We used Kaplan-Meier analysis and log-rank testing for survival comparisons. We employed Cox proportional model to perform multivariate analyses of the patient population; and accordingly hazard ratios with corresponding 95%CI were generated. Statistical significance was considered if a two-tailed P value < 0.05 was achieved.RESULTSA total of 13233 patients with stage IV pancreatic cancer and known sites of distant metastases were identified in the period from 2010-2013 and they were included into the current analysis. Patients with isolated distant nodal involvement or lung metastases have better overall and pancreatic cancer-specific survival compared to patients with isolated liver metastases (for overall survival: lung vs liver metastases: P < 0.0001; distant nodal vs liver metastases: P < 0.0001) (for pancreatic cancer-specific survival: lung vs liver metastases: P < 0.0001; distant nodal vs liver metastases: P < 0.0001). Multivariate analysis revealed that age < 65 years, white race, being married, female gender; surgery to the primary tumor and surgery to the metastatic disease were associated with better overall survival and pancreatic cancer-specific survival.CONCLUSIONPancreatic adenocarcinoma patients with isolated liver metastases have worse outcomes compared to patients with isolated lung or distant nodal metastases. Further research is needed to identify the highly selected subset of patients who may benefit from local treatment of the primary tumor and/or metastatic disease.
基金Supported by a grant from the 973 National Great Foundation Research Program of China (No. 2002CB513100).
文摘Objective: To establish a nude mice model of human osteosarcoma lung metastasis. Methods: The growth of human osteosarcoma cell sublines M8 and M6 was determined by MTT assay. 2 × 107 cells were injected into the tail vein of nude mice. Mice were sacrificed started on week 4 after injection, and lung metastases were evaluated under both mac-roscopic and microscopic observation with HE staining. Results: The growth of low-metastatic subline M6 was lower than high-metastatic sublines M8. Seventeen mice after injected M8 had occurred lung metastases while only one mice had oc-curred in M6 group. Moreover, M8 cells within metastases were arrangement disorder with variable nuclear hyperchromasia. Conclusion: A mouse model for human osteosarcoma cancer lung metastasis can be established by injection different ability of metastasis MG63 cells into tail vein.
