Expression of sialyl Lewis(a) as a new prognostic factor for patients with advanced colorectal carcinoma

Cancer. 1995 Apr 15;75(8):2051-6. doi: 10.1002/1097-0142(19950415)75:8<2051::aid-cncr2820750804>;2-4.


Background: Sialyl Lewis(a) antigen (SLA) is considered to be a cancer-associated carbohydrate antigen.

Methods: A total of 309 surgically resected primary colorectal cancer specimens and 501 associated metastases to regional lymph nodes were analyzed immunohistochemically using a monoclonal antibody (NS19-9) recognizing SLA. The specimens were obtained from 1981 to 1988 at the Department of Surgery, Keio University School of Medicine (Tokyo, Japan).

Results: Sialyl Lewis(a) antigen expression was detected in 75.4% (233/309) of the primary tumors and in 78.5% (99/126) of the metastases to regional lymph nodes. Significantly stronger expression was noted in the regional lymph node metastases than in the primary lesions (P = 4.5E-7). Sialyl Lewis(a) antigen expression in the primary tumors correlated significantly with regional lymph node metastasis (P < 0.005), recurrence (P < 0.005), and postoperative survival (P < 0.001) as determined by univariate analysis. Sialyl Lewis(a) antigen expression in the regional lymph node metastases also correlated strongly with recurrence (P < 0.005) and survival (P < 0.01). As determined by multivariate analysis, SLA expression in the primary tumor correlated strongly with recurrence (P = 3.0E-6) and survival (P = 6.9E-3).

Conclusions: Sialyl Lewis(a) antigen expression in primary tumors and metastases to regional lymph nodes is a useful marker for evaluating tumor aggressiveness and prognosis in patients with advanced colorectal cancer.

MeSH terms

  • Aged
  • Biomarkers, Tumor / analysis*
  • Colorectal Neoplasms / immunology*
  • Colorectal Neoplasms / mortality
  • Colorectal Neoplasms / pathology
  • Colorectal Neoplasms / surgery
  • Humans
  • Immunoenzyme Techniques
  • Lewis Blood Group Antigens / analysis*
  • Middle Aged
  • Multivariate Analysis
  • Prognosis


  • Biomarkers, Tumor
  • Lewis Blood Group Antigens