_:vb50956364 . _:vb50956364 . _:vb50956364 "url:https://www.ncbi.nlm.nih.gov/pubmed/622667"^^ . _:vb50956364 . _:vb50956364 . _:vb50956364 "An in situ carcinoma that is located_in the rectum."^^ . _:vb50956364 .