Pyloric stenosis is
A) an obstructive narrowing of the pyloric sphincter.
B) a condition in which the pyloric sphincter muscles do not relax, so food cannot leave the stomach.
C) caused by the bacterium Helicobacter pylori.
D) both A and C.

Question

Quizplus · Accepted Answer

Pyloric stenosis is an obstructive narrowing of the pyloric sphincter, which is the muscle that controls the flow of food from the stomach to the small intestine. It is not caused by Helicobacter pylori infection, which is a separate condition that can lead to gastritis and peptic ulcers. While B may seem like a plausible option, it is not accurate as pyloric stenosis actually results in the opposite problem of food not being able to leave the stomach, rather than the sphincter not opening to allow the food to pass through.

Pyloric Stenosis Is