We report the clinical, radiological and electrophysiological signs in two
unrelated girls with the connatal form of Pelizaeus-Merzbacher disease (PMD
). MRI plays an important role in the diagnosis, demonstrating the virtual
absence of myelination. PMD is classically described as an X-linked leukody
strophy. Our two cases reinforce the hypothesis of a possible autosomal rec
essive transmission of the connatal form of PMD in some families, as recent
ly presented.