Inflammatory pseudotumour of the post-bulbar duodenum.

The cases of five patients with upper gastrointestinal barium examination findings suggestive of a post-bulbar duodenal tumour are presented. Further investigations failed to confirm evidence of a neoplasm, but instead identified post-bulbar duodenal ulceration or scarring. Possible causes for these findings, technical considerations for avoiding this pitfall, and the importance of appropriate further investigations are discussed.