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J Med Genet. 1991 June; 28(6): 417–419.
PMCID: PMC1016911

Non-penetrance in tuberous sclerosis.

Abstract

Non-penetrance has not been reported in tuberous sclerosis when modern non-invasive investigations have been performed. We report a four generation family in which there was a subject with minimal expression and another with non-penetrance between a great grandfather and his great grandson. This situation highlights the need for full investigation of children of tuberous sclerosis patients before counselling a low recurrence risk for the disease.

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