Which observation made of the exposed abdomen is most indicative of pyloric stenosis?
a. Abdominal rigidity
b. Substernal retraction
c. Palpable olive-like mass
d. Marked distention of lower abdomen
ANS: C
The diagnosis of pyloric stenosis is often made after the history and physical examination. The olive-like mass is easily palpated when the stomach is empty, the infant is quiet, and the abdominal muscles are relaxed. Abdominal rigidity and substernal retraction are usually not present. The upper abdomen, not lower abdomen, is distended.
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