title: [Effect of laparoscopic radical operation on systemic immunity in patients with colorectal cancer].
abstract: OBJECTIVE
  To compare the effect of laparoscopic radical operation and open operation on systemic immunity in patients with colorectal cancer.
  
  
  METHODS
  Sixty patients with colorectal cancer were randomly divided into laparoscopic and open operation groups from March 2004 to December 2004, each group had 30 cases. CRP, IgA, IgM, IgG, CD3 (+) cells, CD4 (+) cells, CD8 (+) cells, NK cells, CD4 (+) CD5RA (+) cells, CD4 (+) CD45RO (+) cells and lymphocytes in peripheral blood were counted and compared on the 1st day before operation, 3rd and 7th day after operation.
  
  
  RESULTS
  The two groups were comparable as for age, tumor location and stages. In open operation group, lymphocyte counts were (1.09+/- 0.29) x 10(9)/L, CD4 (+) cell (0.54 +/- 0.14) x 10(9)/L, CD8 (+) cell (0.31 +/- 0.08) x 10(9)/L, CD4 (+) CD45RO (+) (61.1+/- 8.9)%, and IgM level (136.9+/- 52.8) IU/ml, IgG (115.2 +/- 45.7) IU/ml on the 3rd day after operation, CD8 (+) cell counts were (0.32 +/- 0.09) x 10 (9)/L, CD4 (+) CD45RO (+) cell (63.2 +/- 9.1)% on the 7th day after operation, were all significantly lower than those on the 1st day before operation respectively(P< 0.05, P< 0.01). In laparoscopic operation group, the decreases of such parameters except CD4 (+) CD45RO (+) cell (62.7 +/- 12.5)% were not obvious on the 3rd day after operation. There were significant difference in lymphocyte counts (1.29 +/- 0.37) x 10( 9 )/L, IgM (164.5 +/- 48.2) IU/ml and CD8 (+) cell counts (0.38 +/- 0.09) x 10 (9) /L on the 3rd day after operation between two groups (P< 0.05).
  
  
  CONCLUSIONS
  Compared with open radical operation, laparoscopic radical operation has predominance in protecting systemic immunity to treat colorectal carcinoma.
authors.affiliation: Department of Gastrointestinal Surgery, Beijing Hospital, Beijing 100730, China. chinazhaogang@sohu.com
authors.forename: Gang
authors.initials: G
authors.lastname: Zhao
authors.forename: Gang
authors.initials: G
authors.lastname: Xiao
authors.forename: Mei-xiong
authors.initials: MX
authors.lastname: Huang
authors.forename: Hai-kong
authors.initials: HK
authors.lastname: Long
mesh_terms: D000368:Aged; D016516:CD4-CD8 Ratio; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D015179:Colorectal Neoplasms / Q000276:immunology* / Q000601:surgery*; D005260:Female; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology; D010535:Laparoscopy; D018655:Lymphocyte Count; D008297:Male; D008875:Middle Aged