Which is the most common cause of the below condition

Upper-gastrointestinal-contrast X-ray of a patient showing total gastric outlet obstructionThe two common causes of gastric outlet obstruction are gastric cancer and pyloric stenosis secondary to peptic ulceration. Previously, the latter was more common. Now, with the decrease in the incidence of peptic ulceration and the advent of potent medical treatments, gastric outlet obstruction should be considered malignant until proven otherwise, at least in resource-rich countries.Bailey and love 27e pg: 1129