title: An evidence-based medicine approach to the laparoscopic treatment of colorectal cancer.
abstract: During the 1990s, laparoscopic resection was established as a treatment for gastrointestinal malignant tumors.　A number of randomized controlled trials comparing laparoscopic-assisted colorectal surgery with conventional open colorectal surgery for colon cancer have been conducted.　These trials have shown short-term benefits, and the vast majority demonstrated no significant difference in long-term outcomes.　Laparoscopic-assisted colorectal surgery is widely performed for the treatment of colon cancer, whereas laparoscopic-assisted colorectal surgery for rectal cancer is less commonly performed.　In recent years, there have been an increasing number of reports of laparoscopic-assisted colorectal surgery for rectal cancer, where improving short-term outcomes was shown, but no definitive effect on long-term survival has been shown to date.　Randomized controlled trials focusing on long-term survival are currently ongoing.
authors.affiliation: Department of Coloproctology, Aizu Medical Center, Fukushima Medical University.
authors.forename: Taisuke
authors.initials: T
authors.lastname: Otani
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Isohata
authors.forename: Kensuke
authors.initials: K
authors.lastname: Kumamoto
authors.forename: Shungo
authors.initials: S
authors.lastname: Endo
authors.forename: Kenichi
authors.initials: K
authors.lastname: Utano
authors.forename: Daiki
authors.initials: D
authors.lastname: Nemoto
authors.forename: Masato
authors.initials: M
authors.lastname: Aizawa
authors.forename: Alan K
authors.initials: AK
authors.lastname: Lefor
authors.forename: Kazutomo
authors.initials: K
authors.lastname: Togashi
mesh_terms: D015179:Colorectal Neoplasms / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D019317:Evidence-Based Medicine; D006801:Humans; D010535:Laparoscopy; D009362:Neoplasm Metastasis