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Related to duodenal cap: Ligamentum venosum, duodenal ampulla
the first portion of the duodenum, as seen in a radiograph or by fluoroscopy.
Synonym(s): duodenal bulb
du·o·de·nal cap(dū'ō-dē'năl kap)
The first portion of the duodenum, as seen in a roentgenogram or by fluoroscopy.