1. The surgical alteration to widen the pylorous in order to facilitate the passage of food from the stomach to the duodenum or small intestine.
2. A surgical operation to widen the opening between the stomach and the small intestine, which allows stomach contents to pass more freely from the stomach.

With the patient under anesthesia the pyloric opening is dilated or expanded and diarrhea is a common postoperative complication.

3. An elective surgical procedure in which the lower portion of the stomach, the pylorus, is cut and resutured, to relax the muscle and to widen the opening into the intestine.

Pyloroplasty is a treatment for high-risk patients for gastric or peptic ulcer disease.

A peptic ulcer is a sore on the stomach where the lining of the stomach or duodenum has been eaten away by stomach acid and digestive juices.

The end of the pylorus is surrounded by a strong band of muscle (pyloric sphincter), through which the contents of the stomach are emptied into the duodenum (the first part of the small intestine). Pyloroplasty widens this opening into the duodenum.

Posterior pyloromyotomy combined with the Heineke-Mikulicz pyloroplasty (enlargement of a pyloric stricture).

The enlargement of the pyloric canal with the establishment of an inverted U-shaped anastomosis (surgical union of two hollow organs) between the stomach and duodenum after a longitudinal incision.

Tjhe enlargement of a pyloric stricture by incising the pylorus longitudinally and suturing the incision transversely.