A cluster of cases of late onset amyloidosis, presenting chiefly with peripheral neuropathy and cardiac failure, has been described in Donegal, north-west Ireland. Molecular genetic and protein analyses show that two new patients from the same region have a mutation in the transthyretin gene previously reported in a family with an Irish ancestor from the Appalachian region of the United States.
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Staunton et al. (1991) studied this question.