| http://www.w3.org/ns/prov#value | - A cyst of the ampulla of Vater, described by Brooks and Weinstein,2 appears to be one of the mucosa covering the ampulla of Vater, and yet it was both lined and covered with normal duodenal mucous membrane so that, as the authors described, this cyst was a congenital anomaly of the duodenal wall.
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