Case presentations: Ulcers

• Presented with abdominal pain, vomiting, and ileus. • A circumferential stenotic lesion was present in the jejunum, as a slightly discolored tumor with a gradual marginal rising appearance (a, b). • Half of the circumference of the tumor was covered with a thin white coat, and the lumen showed extremely poor distensibility, even with a large amount of insuffl ation. • Dye spraying clearly demarcated the boundary between the tumor and surrounding normal mucosa. • Partly nodular changes were also visible at the site of stenosis (c, d).