Emily, a newborn, was miserable and vomiting frequently. An X-ray revealed hypertrophic pyloric stenosis. The problem in Emily's digestive system, before surgery helped her, wasÂ
A. an overgrowth of the stomach wall that narrows the opening between the esophagus and stomach.
B. an abnormally large peptic ulcer near the opening of the esophagus into the stomach.
C. a genetic defect resulting in the absence of the pyloris.
D. overgrowth of muscle that blocked the passageway from the stomach to the small intestine.
Answer: D
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