Abstract
We describe an asymptomatic male infant with isolated 3-methylcrotonyl-coenzyme A carboxylase deficiency who came to medical attention by newborn mass screening due to elevated blood leucine. The diagnosis was made by abnormal urinary organic acids at 20 days of age and was confirmed by assay of the carboxylase activities in cultured skin fibroblasts.
Conclusion More attention should be paid to slight elevations of leucine levels in newborn mass screening. Urinary organic acid analysis should be performed in conspicuous cases.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 9 October 1996 / Received in revised form and accepted: 18 February 1997
Rights and permissions
About this article
Cite this article
Ihara, K., Kuromaru, R., Inoue, Y. et al. An asymptomatic infant with isolated 3-methylcrotonyl-coenzyme A carboxylase deficiency detected by newborn screening for maple syrup urine disease. Eur J Pediatr 156, 713–715 (1997). https://doi.org/10.1007/s004310050696
Issue Date:
DOI: https://doi.org/10.1007/s004310050696