Wolf B, Freehauf C L, Thomas J A, Gordon P L, Greene C L, Ward J C
Department of Pediatrics, Connecticut Children's Medical Center, 282 Washington Street, Hartford, CT 06106, USA.
J Inherit Metab Dis. 2003;26(8):805-9. doi: 10.1023/B:BOLI.0000009949.65855.4c.
We report two children who presented with symptoms suggestive of biotinidase deficiency. Rather than deficiency, markedly elevated serum biotinidase activities were found. Based upon literature reports of elevated biotinidase activities in children with glycogen storage disease (GSD) type Ia, we considered the latter in our differential diagnosis and subsequently confirmed GSD type Ia in both patients by enzymatic testing. GSD type Ia should be considered in children with markedly elevated serum biotinidase activity.
