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  Vol. 115 No. 4, April 1997 TABLE OF CONTENTS
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Norrie disease in a family with a manifesting female carrier

K. B. Sims, A. R. Irvine and W. V. Good
Developmental Neurogenetics Laboratories, Massachusetts General Hospital, Charlestown, USA.

OBJECTIVES: To show that Norrie disease can occur in a girl and to describe her ophthalmologic and genetic features. METHODS: Amplification of DNA polymerase chain reaction and sequencing of asymmetric polymerase chain reaction for exon 3 were performed on the blood specimen obtained from a girl born with bilateral retinal detachments. PATIENT: A female child with bilateral retinal detachment who had 2 uncles in whom Norrie disease had already been diagnosed. RESULTS: The child had a mutation in the third exon (T776-->A; Ile 123-->Asn) identical to the mutation found in her uncles. CONCLUSIONS: Norrie disease can occur in girls. The most likely explanation is nonrandom or unfavorable X inactivation, although timing of development of the peripheral retina and its blood supply could render it vulnerable to effects of the mutant allele at a critical developmental phase.

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