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Review Question - QID 214263

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QID 214263 (Type "214263" in App Search)
An 8-week old boy is brought to his pediatrician by his mother due to a 2-week history of lethargy, poor feeding, and constipation. The mother received no prenatal care and the infant was delivered at 37 weeks gestational age at home. He is at the 97th percentile for head circumference, 60th percentile for length, and 50th percentile for weight. Vital signs are within normal limits. On examination, the infant has scleral icterus, an enlarged tongue, and poor muscle tone in all extremities. Which of the following will most likely be seen on laboratory examination?