Arch Surg. 1932;25(1):122-177. doi:10.1001/archsurg.1932.01160190125007.
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The subject of neoplastic growths occurring in the small intestine is a difficult one to approach in view of the paucity of material. The infrequency of gastro-intestinal tumors located between the pylorus and the ileocecal valve is one of the many unsolved problems of cancer pathology and it is interesting to speculate why this part of the alimentary canal is relatively immune to tumor invasion when the portals of entrance and exit, namely the stomach and the large intestine, are among the most common sites for cancer. Literature on this subject is not scarce, but the majority of publications in the past have dealt with case reports alone. Few authors have ventured to discuss the theories of causation and pathogenesis. A former paper (1931) dealt with the clinical aspects of tumors of the small intestine, special emphasis being laid on the diagnostic importance of the roentgen rays. The purpose of


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