We describe a family with the unusual association of Cowden's disease and B
annayan-Riley-Ruvalcaba syndrome. The father has characteristic mucocutaneo
us features that are palmoplantar keratoses, multiple facial papules, oral
papillomatoses, lipomas, and vitiligo with involvement of the thyroid and d
igestive tract. The son presents with pigmented macules of the penis, macro
cephaly, and a lipoma that are typical for Bannaya-Riley-Ruvalcaba syndrome
. Recent studies have demonstrated that these 2 diseases are allelic disord
ers at the PTEN locus on chromosome 10q.