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Retired NBME 21 Answers

nbme21/Block 4/Question#18 (reveal difficulty score)
A previously healthy 4-week-old male newborn ...
Pyloric stenosis ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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 +8  upvote downvote
submitted by โˆ—hungrybox(1277)
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HIGH YIELD: "nonbilous vomiting" means that the issue/obstruction comes before (proximal to) the second duodenum, where bile is released.

At around ~4 weeks (give or take a few) is when pyloric stenosis usually shows up.

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mannywillsee  Sadly the easiest question that just jumped out of its way and said Pick me! +



 +2  upvote downvote
submitted by โˆ—divya(75)
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obvious answer choices between duodenal atresia and pyloric stenosis. duodenal atresia presents with bilious vomiting within 1st day of life. other features - double bubble on xray. whereas pt here has non bilious vomiting at 4th week of life.

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