_:vb50955060 . _:vb50955060 "A benign perivascular tumor that is characterized as a vascular variant of a glomus tumor."^^ . _:vb50955060 . _:vb50955060 . _:vb50955060 . _:vb50955060 "url:https://www.ncbi.nlm.nih.gov/pubmed/28656356"^^ . _:vb50955060 .