Direct metastatic spread of right colonic adenocarcinoma to duodenum--barium and computed tomographic findings.

Contiguous involvement of the duodenum from primary right-sided colonic neoplasms is relatively uncommon. More rarely, metastatic involvement of the duodenum occurs after resection of a primary carcinoma of the right colon. Until recently, the radiological assessment of this pathologic process has been limited to barium gastrointestinal imaging techniques. Three cases of primary right colonic tumors metastasizing to the duodenum are presented, and barium studies are correlated with CT findings in 2 of these cases.