Neuropathy in two cobalamin-deficient breast-fed infants of vegetarian mothers

We describe the electrophysiological findings in 2 infants with deficient c obalamin intake. After normal development, psychomotor regression appeared after the 6th month, leading to severe hypotonia and apathy before the 12th month. Electrodiagnostic evaluation showed sensory neuropathy in both case s, associated with motor neuropathy in 1 case. Thus, in an acquired floppy infant syndrome, electrophysiological signs of peripheral neuropathy contri buted to the diagnosis of a curable metabolic disorder. (C) 1999 John Wiley & Sons, Inc.