Central nervous system abnormalities in chromosome deletion at 11q23.
Two Japanese pediatric patients with terminal deletion of the long arm of chromosome 11 are described. Both had the morphological abnormalities of the 11q deletion syndrome, such as prominent epicanthal folds, broad flat nasal bridge with short, upturned nose, short philtrum with carp-shaped mouth, cardiac anomalies and nonprogressive moderate psychomotor developmental delay. Patient 1 is the first case to be reported with 11q deletion with serial magnetic resonance (MR) examinations of cerebral white matter. The initial MR imaging studies demonstrated multiple areas of T1 and T2 prolongation in the cerebral white matter in both patients at the ages of 2 5/12 and 2 1/12 years, respectively. A second MR imaging, performed 1 year after the first in Patient 1, demonstrated slight improvement of the lesions. Neither patient showed clinical deterioration. These results suggest that the lesions were caused by delayed myelination, rather than by demyelination. It is suggested that an unknown factor which is important for myelination is located on the long arm of chromosome 11: perhaps the neural cell adhesion molecule (NCAM).
Ono
J
J
Department of Pediatrics, Faculty of Medicine, Osaka University, Japan.
Harada
K
K
Hasegawa
T
T
Sakurai
K
K
Kodaka
R
R
Tanabe
Y
Y
Tanaka
J
J
Igarashi
T
T
Nagai
T
T
Okada
S
S
D000015:Abnormalities, Multiple / Q000235:genetics; D001921:Brain / Q000002:abnormalities*; D015816:Cell Adhesion Molecules, Neuronal / Q000235:genetics*; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000235:genetics*; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D002880:Chromosomes, Human, Pair 11; D002658:Developmental Disabilities / Q000235:genetics; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009186:Myelin Sheath / Q000235:genetics* / Q000502:physiology; D011596:Psychomotor Disorders / Q000235:genetics; D014057:Tomography, X-Ray Computed
D015816:Cell Adhesion Molecules, Neuronal