Cowden syndrome: report of a large family with macrocephaly and increased severity of signs in subsequent generations

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Abstract
We report Cowden syndrome in a large four-generation family, paying special attention to the apparently greater severity and earlier onset of signs and symptoms in subsequent generations. Macrocephaly was present in all affected individuals and was markedly progressive in three of six affected children of the fourth generation, and associated with slight to moderate delay in psychomotor development.