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  #1  
Old 11-23-2012
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Default Pediatric Q?

A 1-week-old newborn has had poor feeding,vomiting, and progressive lethargy over the past 4 days. She was born at term; pregnancy,labor, and delivery were uncomplicated, and she had no congenital anomalies. She is being breast-fed. She has a healthy 2-year-old brother; a sister died at 10 days of age after a full-term birth.Examination shows decreased muscle tone and poor responsiveness;reflexes are normal.Serum bicarbonate level is 8 mEq/L, pH is 7.15, and plasma ammonia level is 10 times the upper limit of normal. Which of the following is the most likely cause?

A
) Mitochondrial disorder

B
) Mucopolysaccharidoses disorder

C
) Organic acid metabolism disorder

D
) Renal tubular acidosis

E
) X-linked leukodystrophy
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Old 11-24-2012
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I think it's C

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Old 11-24-2012
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X-linked dominant inheritance

Organic acid metabolism disorder
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  #4  
Old 11-24-2012
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organic acid disorder....low bicarbonate, severe acidosis and elevated ammonia levels...
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