V. Baltaci et al., A case associated with Walker Warburg syndrome phenotype and homozygous pericentric inversion 9. coincidental finding or aetiological factor?, ACT PAEDIAT, 88(5), 1999, pp. 579-583
We describe a rare occurrence of pericentric inversion in homologues of chr
omosome 9 observed in a 2-mo-old female baby with eye and brain abnormaliti
es. Her clinical and neuroradiological features are similar to the signs of
Walker-Warburg syndrome. We found the same inversion in heterozygous condi
tion in all metaphases of both parents, who are related, and in two grandpa
rents and their mother. The cytogenetic abnormality alone does not explain
the phenotype in this patient, but it warrants further linkage studies with
emphasis on the pericentric region of chromosome 9 in patients with Walker
-Warburg syndrome phenotype. This family case is unique and raises suspicio
ns about whether the pericentric region of chromosome 9 has any connection
with the phenotype of Walker-Warker syndrome.