Gastric outlet obstruction, or pyloric stenosis, occurs when the end of the stomach or the pylorus narrows. The pylorus is the opening from the stomach into the small intestine. Gastric outlet obstruction often occurs with gastric cancer and it is diagnosed with computed tomography (CT) scans and oral contrast radiographs.

If you develop gastric outlet obstruction, we may perform endoscopic therapy or surgery.


Endoscopic therapy

We’ll perform an endoscopy to open the obstructed area, perhaps using a well-lubricated balloon passed through the endoscope and positioned in the area that has narrowed. We’ll inflate the balloon to dilate the opening. If the obstruction is malignant, we may place a shunt or a self-expanding stent in the area to keep it open thereby allowing you to eat.



The goal of surgery for gastric outlet obstruction is to remove the obstruction. The surgical procedure may be similar to that for gastric or stomach cancer, during which part of your stomach will be removed. This is most often done laparoscopically or robotically.