Arterial submucous plexus of duodenum (1st 2.5 cm): vascular etiology in duodenal ulcers.

The arterial submucous plexus in 5 human duodena (1st 2.5 cm of duodenum) were studied by injecting India-ink. The submucous plexus was richly vascular, which excluded the possibility of the end arteries to be the causative factor in production of ulcers in this region. Perhaps, the ulcers in this region may be due to obstruction of blood flow caused by traction of an over filled stomach.