_:vb50955996 . _:vb50955996 . _:vb50955996 . _:vb50955996 . _:vb50955996 . _:vb50955996 "An oral cavity carcinoma in situ that is located_in the lip."^^ . _:vb50955996 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1465369/"^^ .