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Retired NBME 18 Answers

nbme18/Block 1/Question#38 (reveal difficulty score)
45 yo homeless man found unconscious
Methylmalonic Acid: normal; Homocysteine: increased ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—match95(56)
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Question was tricky -- need to look ate FOLATE levels. Both B12 deficiency and folate deficiency will cause an increase in homocysteine. Only B12 deficiency will cause an increase in BOTH methylmalonic acid AND homocysteine.

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cheesetouch  B12 deficiency 'BOTH be high' (and neuro sx) +
handsome  WHAT IS THE significance of 14.6 difficulty score of this question? +1
drdoom  What is the significance of 14 upvotes? Itโ€™s a relative scale. The higher the difficulty score, the greater the difficulty. +



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