Diagnosis of submucosal tumors by injecting a water soluble contrast medium: Judgement of tumor developing pattern and endoscopic lumpectomy.

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Abstract
With the remarkable increases in the number of cases of endoscopical removal of submucosal tumors spurred by the application of high-frequency current, it has become more and more important to apply some reliable methods to differentiate between tumors and other tumescent lesions due to extra-gastric pressure similar in configuration to tumors and also to confirm the development patterns of tumors either intragastric or extra-gastric. Such preparatory arrangements seem indispensable to minimize the risk of perforation incidental to the endoscopical treatment of tumors. To cope with another danger of major bleeding following tumor resection, securing on hand an effective hemostatic is indispensable as well. After undergoing endoscopical lumpectomies the patients were subjected to quiet rest and fasting for 2 or 3 days. When they were ready to resume a regular diet, they were endoscopically examined before and after each meal to confirm the presence or absence of bleeding. In 12 subjects of this series treated with routine and finally with lumpectomies for gastric submucosal tumors, no serious adverse reactions developed.

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