Abstract
Propionic acidemia is an autosomal recessive disorder as a result of a deficient activity of propionyl-CoA carboxylase. Propionyl CoA is metabolized by propionyl-CoA carboxylase to methylmalonyl CoA. Propionic acidemia is a major cause of ketotic hyperglycinemia. This disorder is characterized by episodic vomiting, dehydratation, feeding intolerante, lethargy, hypotonia, metabolic acidosis, ketosis and hyperammonemia. The patient presented herein was a full-term female newborn with encephalopathy in the first days of life. She presented hypoglycemia, metabolic acidosis with increased anion gap, ketosis, hyperammonemia, anemia, leukopenia and thrombocytopenia. The brain ultrasonography was normal. The tandem mass expectrometry done by Pediatrix was abnormal, with the acylcarnitine results consistent with an organic acidemia. The parents are consanguineus and have a history of abortus, miscarriage and neonatal death, characteristics suggestive of the presence of genetic defects.
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