title: The outcome of laparoscopic colorectal resection in T4 cancer.
abstract: OBJECTIVE
  Laparoscopic surgery for locally advanced tumours with extramural involvement is still controversial. It is believed that laparoscopic excision of T4 cancers is technically difficult and may result in prolonged operative time, increased conversion rate, added postoperative morbidity, and suboptimal oncological clearance.
  
  
  METHODS
  Our unit has been practising laparoscopic colorectal surgery since 1992, and all data are entered into a database prospectively. Since 1999 we have routinely used the laparoscopic approach for colorectal cancer resections. Data regarding patients with a histologically T4 cancer operated on between 1999 and 2008 were analysed. Outcomes included operating time, conversion rate, postoperative complications and oncological outcome.
  
  
  RESULTS
  Over a 10-year period, 146 patients (male 75) with a T4 cancer underwent laparoscopic resection. The median operating time was 125 (range, 46-285) min and the median blood loss was 50 (0-1800) ml. The conversion rate was 16%. Six (4.1%) patients experienced anastomotic leakage. The median number of lymph nodes harvested was 13 (2-40). One hundred and two (70%) patients underwent curative resection. The recurrence rates were 41% and 53% for stage II and III patients, respectively. Four (3.9%) patients had local recurrence. At a median follow up of 18 (1-118) months, the overall survival was 25 months, with median overall survival for patients with stage II, III and IV disease being 63, 36 and 12 months, respectively.
  
  
  CONCLUSIONS
  Laparoscopic colectomy in histologically T4 cancer is safe. Oncological outcomes remain satisfactory. Based on our data, provided expertise is available, patients with locally advanced tumours should not be excluded from a laparoscopic approach.
authors.affiliation: Department of Surgery, Pamela Youde Nethersole Eastern Hospital, Hong Kong, China. dennis_ckng@yahoo.com.hk
authors.forename: D C K
authors.initials: DC
authors.lastname: Ng
authors.forename: C S
authors.initials: CS
authors.lastname: Co
authors.forename: H Y S
authors.initials: HY
authors.lastname: Cheung
authors.forename: C C
authors.initials: CC
authors.lastname: Chung
authors.forename: M K W
authors.initials: MK
authors.lastname: Li
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003082:Colectomy; D015179:Colorectal Neoplasms / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D010535:Laparoscopy; D008197:Lymph Node Excision; D008297:Male; D008875:Middle Aged; D015996:Survival Rate