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2006:
Lesca Gaetan; Fallet-Bianco Catherine; Plauchu Henri; Vitrey Danielle; Verloes Alain; Attia-Sobol Jocelyne
Orofaciodigital syndrome with cerebral dysgenesis.
American journal of medical genetics. Part A 2006;
140(
7):.
Orofaciodigital syndromes (OFD) are a group of diseases classified according to the phenotype and the mode of inheritance. We report on a fetus presenting with some features of the OFDs but with additional global cerebral dysgenesis. Ultrasonography at 19 weeks of pregnancy disclosed hypoplasia of the cerebral hemispheres with a large intrahemispheric cyst, as well as dysmorphic facial features and brachy-syndactyly IV-V. Fetal brain MRI confirmed these features and disclosed additional morphological anomalies: Agenesis of the vermis, complete agenesis of the corpus callosum, pachygyria of the left hemisphere. Pathological examination showed a disproportionate fetus with large head and short limbs. Dysmorphic features included hypertelorism, broad nasal root, long philtrum, severe micrognathia, microstomia, cleft palate, and lobulated tongue. Radiographs showed distal malformations of the four limbs. Neuropathological examination showed a severe disturbance of the architecture of both hemispheres, more severe on the right side, with four cystic structures located between the hemispheres. Olfactory stalks, mammillary bodies, and midline structures were absent. Cerebellum and brainstem were hypoplastic. On the right hemisphere as on most part of the left one, microscopic findings displayed a complete disruption of the developing mantle with disturbance of the neuronal migration. The present fetus fulfilled the diagnosis of OFD syndrome: Dysmorphic features, cleft palate and lobulate tongue and polysyndactylies of the feet and hands. The cerebral involvement would make it closer to OFD type VI, but brain malformations were far more severe in the present case, with complex and generalized cortical dysgenesis, evoking a disturbance occurring at a very early stage of the embryogenesis.
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