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Prenatal diagnosis of tuberous sclerosis with intracerebral signs at 14 weeks' gestation

✍ Scribed by K. J. Brackley; P. A. Farndon; J. B. Weaver; D. J. Dow; S. Chapman; M. D. Kilby

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
222 KB
Volume
19
Category
Article
ISSN
0197-3851

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✦ Synopsis

We report the ultrasound detection of cranial abnormalities at 14 weeks' gestation in a fetus subsequently confirmed as having tuberous sclerosis using DNA linkage analysis within the affected family. The presence of asymmetrical ventricular enlargement persisted antenatally. Magnetic resonance imaging at 26 weeks indicated the possibility of poor gyral formation consistent with a neuronal migration disorder. Cardiac rhabdomyomata were not visualized on ultrasound scan until 30 weeks' gestation. Postnatal cranial ultrasound confirmed the significant neuropathology which was manifested by severe developmental delay and intractable fits in the child. The potential benefits of earlier diagnosis of tuberous sclerosis by cranial imaging are discussed, although in this patient the routine booking scan resulted in a path of prenatal diagnosis being undertaken which had originally been declined. A mechanism is proposed to explain the variable expression of tuberous sclerosis within this family based on altered TSC2 activity affecting neuronal migration.

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