_:vb50937339 . _:vb50937339 . _:vb50937339 . _:vb50937339 . _:vb50937339 . _:vb50937339 . _:vb50937339 . _:vb50937339 "A Cowden syndrome that is characterized by macrocephaly, multiple noncancerous tumors and hamartomas, and dark freckles on the penis, and has_material_basis_in heterozygous germline mutation in the PTEN gene on chromosome 10q23."^^ . _:vb50937339 "url:https://www.ncbi.nlm.nih.gov/pubmed/31062505"^^ . _:vb50937339 "url:https://ghr.nlm.nih.gov/condition/bannayan-riley-ruvalcaba-syndrome"^^ . _:vb50937339 . _:vb50937339 "url:https://www.ncbi.nlm.nih.gov/books/NBK1488/"^^ . _:vb50937339 "url:https://en.wikipedia.org/wiki/Bannayan%E2%80%93Riley%E2%80%93Ruvalcaba_syndrome"^^ .