"brain stem medulloblastoma"^^ . "disease_ontology"^^ . _:vb50937830 _:vb50937829 . . _:vb50937828 . . "DOID:0050899"^^ . _:vb50937831 . _:vb50937829 . "A brain stem cancer that begins in the lower part of the brain on the floor of the skull."^^ . _:vb50937828 . _:vb50937829 . _:vb50937830 . _:vb50937828 . . _:vb50937831 _:vb50937830 . _:vb50937831 . "lschriml"^^ . _:vb50937830 . "2014-10-06T14:23:29Z"^^ . . _:vb50937829 . _:vb50937829 . . _:vb50937828 _:vb50937831 .