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Soluble angiogenesis markers in gastric tumor patients.

Gastric cancer is the second commonest cause of cancer-associated death in the world. Its molecular markers can be useful not only for diagnostic, but also prognostic purposes. The aim of the study was to assess the usefulness of soluble angiogenesis markers such as endoglin and VEGFR2 in gastric cancer patients and to compare these results with those of VEGF levels. As a secondary objective, we compared the concentrations of all three soluble markers in plasma and serum. The study was performed on 26 patients with gastric cancer (17 intestinal-type and 9 diffuse-type), and additionally in 2 patients with B cell lymphoma and 2 with gastro-intestinal stromal tumor. In summary, we showed increases in circulating VEGF-A in patients with both types of gastric cancer. The levels of VEGFR2 did not change significantly in patients with gastric cancer as compared to healthy subjects. Interestingly, after the operation greater levels of VEGFR2 were observed in patients without metastases. Both VEGF and VEGFR2 circulating levels were greater in patients with lymphoma, when compared to both gastric cancer patients and the control group. However, because of small number of patients, this requires further studies. Presented data suggests that endoglin does not seem to be a valuable tool in the assessment of gastric cancer invasion and spread.