Different significance between intratumoral and peritumoral lymphatic vessel density in gastric cancer: a retrospective study of 123 cases

<p>Abstract</p> <p>Background</p> <p>Patients with gastric cancer in China have worse outcome and poorer prognosis. Tumor-induced lymphangiogenesis plays a crucial role in metastasis and tumor progression. The intratumoral and peritumoral lymphatics were supposed to have different biological effects. Three major growth factors, vascular endothelial growth factor- (VEGF)-A, VEGF-C and VEGF-D, are involved in the activation process via their receptors (VEGFRs). The purpose of current study is to investigate the significant difference between intratumoral and peritumoral lymphatic vessel density (LVD) in gastric cancer and their correlations with lymphangiogenetic growth factors.</p> <p>Methods</p> <p>Intratumoral LVD (I-LVD) and peritumoral LVD (P-LVD) of 123 patients with primary gastric cancer were assessed after staining with D2-40, and confirmed by double staining with D2-40/CD34. Proliferative activity of lymphatics endothelium was evaluated by double staining with D2-40/Ki-67. The associations were analyzed between I-LVD/P-LVD and the expression level of VEGF-A, VEGF-C, VEGF-D and the receptor VEGFR-3, which was measured by immunohistochemistry (IHC). The correlations of I-LVD and P-LVD with patient prognosis were also valued.</p> <p>Results</p> <p>(1) The peritumoral lymphatics (PTLs) were relatively enlarged with dilated lumen compared with the intratumoral lymphatics (ITLs). Increased P-LVD was significantly higher than I-LVD (<it>P </it>< 0.05). (2) P-LVD was found significantly associated with lymph node metastasis (LNM) (<it>P </it>< 0.001), lymphatic vessel invasion (LVI) (<it>P </it>< 0.001), VEGF-C (<it>P </it>= 0.003), VEGF-D expression level (<it>P </it>= 0.005) and VEGFR-3 expression level (<it>P </it>< 0.001) in peritumoral tissues, despite no significant association was found between above variants with I-LVD. However, increased I-LVD was demonstrated to be associated with decreased tumor volume (<it>P </it>< 0.001). Neither I-LVD nor P-LVD was correlated with VEGF-A expression (<it>P </it>> 0.05). (3) Proliferative activity of lymphatics endothelium was observed in PTLs, in spite of ITLs. (4) Increased P-LVD, but not I-LVD, was indicated to be an independent risk factor for lymph node metastasis by multivariate logistic regression analysis, and was related to worse disease-free survival and overall survival.</p> <p>Conclusions</p> <p>PTLs play roles in gastric cancer progression. Increased P-LVD, but not I-LVD, was significantly associated with VEGF-C/-D/VEGFR-3 system, and could be an independent risk factor for lymph node metastasis and a prognostic factor in gastric cancer.</p

Detection of lymphovascular invasion in early breast cancer by D2-40 (podoplanin): a clinically useful predictor for axillary lymph node metastases.

Item does not contain fulltextPURPOSE: The aim of this study was to investigate the use of D2-40 for the detection of lymphovascular invasion (LVI) in node positive and negative early breast cancer. LVI is associated with axillary lymph node metastases (ALNM) and a long-term prognostic factor. A precise identification of LVI would have a strong clinical impact for breast cancer patients. METHODS: Immunohistochemical staining with D2-40 and CD34 was performed on formalin-fixed, paraffin-embedded tissue sections of 254 invasive breast tumors of 247 patients with node negative and node positive early breast cancer. All slides were screened for the presence of LVI. Correlation with clinico-pathological factors including LVI as retrieved by routine haematoxylin and eosin (H.E.) stained sections and the eligibility for the prediction of ALNM was assessed. RESULTS: Using the D2-40 antibody for immunostaining, our results demonstrate a significant higher detection (P < 0.001) of LVI as compared with routine H.E.-staining in early breast cancer. LVI was correctly identified by D2-40 (D2-40+) in 70 out of 254 tumors (28%) as compared to 40 tumors (16%) by routine HE staining (HE+). There was a significant correlation between D2-40 + LVI and age, t-stage, nodal status, grading and hormonreceptor-status. Correlation between D2-40 + LVI and menopausal-status, HER2-status and histological type was not significant, while there was a significant correlation of D2-40 and so called "triple negative" tumors (ER/PR and HER2neu-negative). In a multivariate analysis D2-40+ was the strongest predictor for ALNM with an odds ratio of 3.489 and a P-value of P = 0.0003, followed only by T-stage and grading with odds ratios of 3.167 and 1.953 and P-values P = 0.0003 and P = 0.0352. CONCLUSION: Immunostaining with D2-40 significantly increased the frequency of detection of lymphatic invasion compared to conventional H.E.-staining in early breast cancer. As LVI is a strong predictive and prognostic marker, the monoclonal antibody D2-40 has the potential to play a significant role in pathological routine workup of breast tumors. Further prospective studies are needed to prove the clinical impact of D2-40