[Duodenal gastrointestinal stromal tumor (GIST) with deletion in exon 11 of c-kit treated with emergency pancreaticoduodenectomy due to massive bleeding: a case report].

A Japanese woman in her 50s presented with coffee-ground vomiting at a local clinic and was referred to our hospital for further investigation. Esophagogastroduodenoscopy demonstrated a submucosal tumor in the descending part of the duodenum, and she was diagnosed with a gastrointestinal stromal tumor (GIST) by other imaging studies. Elective surgery of the tumor was initially planned.

Gastric inflammatory fibroid polyp morphologically changed by Helicobacter pylori eradication.

A 60-year-old male presented to our hospital for further investigation of abnormal findings on an upper gastrointestinal series. Esophagogastroduodenoscopy demonstrated atrophic gastritis and a submucosal tumor (SMT) at the anterior wall of the antrum. The patient was positive for serum anti-Helicobacter pylori (H.