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4397 Pediatrics

A 3-year-old boy’s parents complain that their child has difficulty walking. The child rolled, sat, and first stood at essentially normal ages and first walked at 13 months of age. Over the past several months, however, the family has noticed an increased inward curvature of the lower spine as he walks and that his gait has become more “waddling” in nature. On examination, you confirm these findings and also notice that he has enlargement of his calves. Which of the following is the most likely diagnosis?

AOccult spina bifida
BMuscular dystrophy
CBrain tumor
DGuillain-Barre syndrome
Pediatrics
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