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This monograph presents the historical development of methods of gastric analysis and the controversy over the type of acid found in gastric contents. The discussion then turns to the occurrence of lactic acid in the gastric contents of normal and carcinomatous stomachs. The assertion is made, and supported by experimental proof, that "lactic acid is usually present in carcinoma of the stomach, but it must also be realized that this is not an early sign." The references are complete.
Gastric Acidity: An Historical and Experimental Study.. JAMA. 1931;97(21):1561. doi:10.1001/jama.1931.02730210059043