Multiple hamartoma syndrome is a syndrome characterized by more than one hamartoma.
It is sometimes equated with Cowden syndrome. However, MeSH also includes BannayanâÂÂZonana syndrome (that is, BannayanâÂÂRileyâÂÂRuvalcaba syndrome) and LhermitteâÂÂDuclos disease under this description. Some articles include Cowden syndrome, BannayanâÂÂRileyâÂÂRuvalcaba syndrome, and at least some forms of Proteus syndrome and Proteus-like syndrome under the umbrella term PTEN hamartoma tumor syndromes (PHTS).