title: Single-site laparoscopic colectomy for rectosigmoid cancer with middle aortic syndrome: report of a case.
abstract: BACKGROUND
  Single-site laparoscopic colectomy (SLC) is a promising minimally invasive and safe treatment for colorectal cancer. Improvements of the working instruments and procedures for SLC have helped to overcome challenges regarding the difficulty of operation, supporting the gradual acceptance of this technique. In contrast, narrow working space of the abdominal cavity sometimes prevents securing an adequate surgical view. To obtain precise anatomical information and enable complete mesocolic excision (CME), we routinely perform three-dimensional computed tomography prior to SLC.
  
  
  METHODS
  A 69-year-old Japanese woman was clinically diagnosed with rectosigmoid cancer. Unexpectedly, preoperative examination revealed asymptomatic stenosis of the great artery, which was diagnosed as middle aortic syndrome. Because radical colectomy requires dissection of vessels that supply blood flow to the legs, a vascular stent was inserted prior to operation. We chose SLC due to the reduced risk of damaging epigastric arteries, which may eventually become collaterals in the event of stent re-stenosis. We accomplished SLC with CME, and the patient was discharged on the tenth day after operation without complications.
  
  
  CONCLUSIONS
  The present case is the first to proceed by SLC for colorectal cancer complicated by vascular obstructive disease. Preoperative imaging enabled us to identify an unexpected rare disease and to still accomplish SLC with CME, thus reinforcing the importance of preoperative imaging to optimize the use of SLC. In addition, SLC may become one of the most adequate procedures for patients complicated by vascular obstructive disease.
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Koki
authors.initials: K
authors.lastname: Tamai
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takemasa
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Mamoru
authors.initials: M
authors.lastname: Uemura
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Junichi
authors.initials: J
authors.lastname: Nishimura
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Taishi
authors.initials: T
authors.lastname: Hata
authors.affiliation: Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka University, Osaka, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Higashihara
authors.affiliation: Department of Diagnostic and Interventional Radiology, Graduate School of Medicine, Osaka University, Osaka, Japan.
authors.forename: Keigo
authors.initials: K
authors.lastname: Osuga
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Tsunekazu
authors.initials: T
authors.lastname: Mizushima
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Yamamoto
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Doki
authors.affiliation: Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871 Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Mori
keywords: Colorectal cancer; Middle aortic syndrome; Single-site laparoscopic colectomy