This case expands the phenotypic spectrum of 3-phosphoglycerate dehydrogenase deficiency. Plasma amino acid chromatography should be added to the list of investigations performed in patients with Charcot-Marie-Tooth–like polyneuropathy, especially if it is associated with psychomotor delay and congenital cataracts.
Méneret, A., Wiame, E., Marelli, C., Lenglet, T., Van Schaftingen, E., & Sedel, F. (2012). A serine synthesis defect presenting with a Charcot-Marie-Tooth-like polyneuropathy. Archives of Neurology, 69(7), 908-911. https://doi.org/10.1001/archneurol.2011.1526 (Original work published 2012)