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Retired NBME Step 2 CK Free 120 Answers

step2ck_free120/Block 1/Question#3 (reveal difficulty score)
A 5-year-old boy is brought to the physician ...
Impaired phagocytic oxidative metabolism ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: Immuno peds

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submitted by โˆ—bwdc(697)
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Recurrent infections with abscesses should raise the suspicion of chronic granulomatous disease. Suppurative arthritis does even more, if youโ€™re likely to remember that. The real diagnosis is made from the Step 1 style question. Nitroblue tetrazolium is the test used to diagnose CGD, which is a defect in NADPH oxidase (the oxidative burst that kills Staph aureus).

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