Q67. (BONUS QUESTION 02) A 3-year-old boy is brought to the…
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Q67. (BONUS QUESTION 02) A 3-yeаr-оld bоy is brоught to the pediаtriciаn due to recurrent respiratory infections and chronic diarrhea. His parents report he has had multiple episodes of pneumonia and otitis media since infancy. Physical exam reveals enlarged tonsils and cervical lymphadenopathy. Labs show: IgM: 850 mg/dL (rr: 40-230 mg/dL), IgG: