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Retired NBME 15 Answers

nbme15/Block 1/Question#39 (reveal difficulty score)
A 3-year-old girl is brought to the physician ...
Dynein ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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submitted by โˆ—cassdawg(1781)
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The combination of recurrent sinopulmonary/ear infections and situs invertus (right sided heart tones and right sided stomach bubble) indicate Kartagener's Syndrome, a defect in dynein. Sinopulmonary infections are predisposed due to the lack of active cilia, and situs invertus is common due to the necessity of cilia in establishing the body axis.

FA2020 p49

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