A rapidly progressive, generally symmetric, ascending flaccid parapare
sis or quadriparesis that develops in an infant or child constitutes a
n uncommon but important pediatric neurologic emergency that requires
immediate evaluation and treatment. The differential diagnosis primari
ly includes acute neuropathies, most commonly the childhood Guillain-B
arre syndrome and, rarely, acute transverse myelitis or infantile poli
omyelitis. A clinical distinction may be difficult in the younger chil
d in whom detailed sensory examination is not possible. Although most
children with Guillain-Barre syndrome usually have a benign and relati
vely limited clinical illness, some become severely ill, requiring int
ubation and careful intensive monitoring. To date, no well-controlled
multi-institutional studies of treatment with either plasmapheresis or
intravenously administered immunoglobulin have been developed in chil
dren despite the success of these modalities in adults. A review of th
e data available using these therapies is included in this study.