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[Application of preoperative angiography in diagnosis of gastric cancer].

To improve preoperative diagnosis of gastric cancer, we applied DSA in clinical diagnosis. 36 patients with gastric cancer were observed. Preoperative DSA and postoperative pathological analysis revealed the following results. With DSA, the accuracy of diagnosis of invasion depth of gastric cancer reached 72.2%. We summarised the criteria for diagnosis of gastric cancer. If subsidiary anastomotic channels narrow or obliterate in DSA, the case may be early cancer. If parietal branches narrow or obliterate in DSA, the cancer may invade the muscle of the stomach. If arcade of this lesser curvature narrows in DSA, the cancer may invade the serosa of the stomach. If the roots of main vascular vessels, such as the left gastric artery, and vascular vessels of other organs narrow or obliterate in DSA, the cancer may directly invade other organs as well. Two-thirds of gastric cancer could be identified through DSA with their shapes and characteristics. The varied shapes of vascular vessels caused by invasion of gastric cancer could reveal growing mode of the cancer.