AIM: To study the distribution of positive lymph nodes within mesorectum and to investigate the possible micrometastasis in negative lymph nodes. METHODS: Large slice technique combined with tissue microarray was used...AIM: To study the distribution of positive lymph nodes within mesorectum and to investigate the possible micrometastasis in negative lymph nodes. METHODS: Large slice technique combined with tissue microarray was used in the pathologic study of 31 specimens.RESULTS: A total of 992 lymph nodes were harvested and cancer metastasis was found in 148 lymph nodes. Some positive lymph nodes were located in the outer layer of mesorectum and more at the same site of mesorectum as the primary tumor. Circumferential margin lymph node metastasis was observed in nine cases. No significant difference in occurrence of micrometastasis was observed in different stage tumors. CONCLUSION: Positive lymph nodes are distributed in mesorectum and micrometastasis can be found in negative lymph nodes.展开更多
In a retrospective study. liquid nitrogen preserved specimens from 50 women with primary breast cancer, who underwent surgery at the Beijing Institute for Cancer Research between June. 1986 and September, 1988, were i...In a retrospective study. liquid nitrogen preserved specimens from 50 women with primary breast cancer, who underwent surgery at the Beijing Institute for Cancer Research between June. 1986 and September, 1988, were investigated. All patients under this study were staged in TNM II or later, involved with axillary lymph node metastasis. and treated with systemic postoperative adjuvant chemotherapy. The median length of follow-up was 69 months. The expression of P-glycoprotein was investigated by means of immunohistochemistry, using a monoclonal antibody C219 specifically against P-glycoprotein and avidin -biotin peroxidase method. Posrtive staining for P-glycoprotein was found in 23(16%) of the 50 patients. The P-glycoprotein expression negative group fared better than the group that was P-glycoprotein posrtive in overall survival curves (p= 0. 0008 , by the generalized Wilcoxon test). The prognostic effect of P-glycoprotein expression remained statistically significant (p=0. 0007) after adjustment by multivariate analysis(Cox’s model)for other prognostic factors. It is demonstrated that P-glycoprotein expression is a significant and independent Predictor of postoperative survival in breast cancer patients. The results of the present study suggest that P-glycoprotein expression might also influence the bioiogical behavior of breast cancers.展开更多
基金Supported by the Grants From the Key Project of National Outstanding Youth Foundation of China,No.39925032
文摘AIM: To study the distribution of positive lymph nodes within mesorectum and to investigate the possible micrometastasis in negative lymph nodes. METHODS: Large slice technique combined with tissue microarray was used in the pathologic study of 31 specimens.RESULTS: A total of 992 lymph nodes were harvested and cancer metastasis was found in 148 lymph nodes. Some positive lymph nodes were located in the outer layer of mesorectum and more at the same site of mesorectum as the primary tumor. Circumferential margin lymph node metastasis was observed in nine cases. No significant difference in occurrence of micrometastasis was observed in different stage tumors. CONCLUSION: Positive lymph nodes are distributed in mesorectum and micrometastasis can be found in negative lymph nodes.
文摘In a retrospective study. liquid nitrogen preserved specimens from 50 women with primary breast cancer, who underwent surgery at the Beijing Institute for Cancer Research between June. 1986 and September, 1988, were investigated. All patients under this study were staged in TNM II or later, involved with axillary lymph node metastasis. and treated with systemic postoperative adjuvant chemotherapy. The median length of follow-up was 69 months. The expression of P-glycoprotein was investigated by means of immunohistochemistry, using a monoclonal antibody C219 specifically against P-glycoprotein and avidin -biotin peroxidase method. Posrtive staining for P-glycoprotein was found in 23(16%) of the 50 patients. The P-glycoprotein expression negative group fared better than the group that was P-glycoprotein posrtive in overall survival curves (p= 0. 0008 , by the generalized Wilcoxon test). The prognostic effect of P-glycoprotein expression remained statistically significant (p=0. 0007) after adjustment by multivariate analysis(Cox’s model)for other prognostic factors. It is demonstrated that P-glycoprotein expression is a significant and independent Predictor of postoperative survival in breast cancer patients. The results of the present study suggest that P-glycoprotein expression might also influence the bioiogical behavior of breast cancers.
