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Distal migration of duodenal tumors: simple prolapse or intussusception?
1Department of Radiology, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8575, Japan.
Background:
To define radiographically simple prolapse or intussusception in cases of distal migration of duodenal tumors.
Methods:
In one pyloric and four duodenal tumors showing distal migration, the findings of gastrointestinal contrast examinations were retrospectively evaluated in relation to CT and operative findings.
Results:
All lesions were intraluminal growing and well demarcated, and they included two carcinoids, a papillary adenoma, a Brunner's gland adenoma, and a hyperplastic polyp. All lesions were accompanied by long mucosal stalks, and, in three, folding deformity of the proximal jejunum was observed. CT showed no target signs except for one with gastroduodenal intussusception. Intussusception was not verified surgically in any cases.
Conclusion:
Distal migration of duodenal tumors can occur as the result of mucosal elongation and slipping. Duodenojejunal intussusception is not necessarily associated with that phenomenon.