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In summary, ten patients were found at Touro Infirmary to have benign duodenal polyps during the ten-year period between January, 1947 to January, 1958. A brief review of embryology and histology was given. Because of lack of stasis and the alkalinity of the duodenum tumors may be less common in this region. We know that tumors, both benign and malignant increase in frequency as the terminal ileum is approached. The rapid elongation of the small intestine late in fetal life may be a factor in possible freedom from fetal rests and rests of development. In our series the age of incidence ranged from 20 to 90 years, with 90 per cent occurring after the age of 40 years. We could not find any definite symptom-complex characteristic of this lesion. When symptomatic, it may simulate any gastric, duodenal or biliopancreatic lesion. In the absence of any demonstrable cause of hemorrhage, benign duodenal polyp should be suspected. The diagnosis must be kept in mind, but can be confirmed by roentgenological studies. The final diagnosis rests, of course, upon microscopic inspection. The treatment of choice is duodenotomy with excision of the polyp. [ABSTRACT FROM AUTHOR]