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NBME 17 Answers

nbme17/Block 3/Question#2 (4.2 difficulty score)
A 3-year-old boy and his 5-year-old brother ...
Factor VIII (antihemophilic factor)🔍

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increased PTT + hemarthroses + easy bruising = Hempophillia A which is a deficiency of Factor 8 and is XL recessive (ie why the mom's brothers have it)