Gastric Cancer

, Volume 9, Issue 4, pp 295–302

Impact of immunohistochemically identified lymphatic invasion on nodal metastasis in early gastric cancer

Authors

  • Akihiro Sako
    • Department of Surgical OncologyUniversity of Tokyo
  • Joji Kitayama
    • Department of Surgical OncologyUniversity of Tokyo
  • Makoto Ishikawa
    • Department of Surgical OncologyUniversity of Tokyo
  • Hiroharu Yamashita
    • Department of Surgical OncologyUniversity of Tokyo
  • Hirokazu Nagawa
    • Department of Surgical OncologyUniversity of Tokyo
Original article

DOI: 10.1007/s10120-006-0396-1

Cite this article as:
Sako, A., Kitayama, J., Ishikawa, M. et al. Gastric Cancer (2006) 9: 295. doi:10.1007/s10120-006-0396-1

Abstract

Background

Among various clinical and pathological findings, lymphatic invasion (Ly) is the strongest risk factor for nodal metastasis in gastric cancer. However, the diagnosis of Ly is subjective and often inaccurate because of the difficulty of detecting lymphatic vessels with conventional hematoxylin and eosin (HE) staining.

Methods

The distribution of lymphatics in the normal gastric wall was immunohistochemically characterized using a new selective marker of lymphatic endothelium, D2-40, in surgical specimens resected for early gastric cancer (EGC). Then, Ly in the primary lesion was reevaluated, and the positive (PPV) and negative (NPV) predictive values for nodal metastasis were comparatively examined for Ly detected by HE staining (Ly-HE) and by immunohistochemical staining (Ly-IM) in 131 cases of EGC.

Results

D2-40-positive lymphatic vessels were observed in the deep proper mucosal layer, and the lymphatic vessel density (LVD) was extremely high in the muscularis mucosa (MM) layer. The number of Ly-IM-positive cases (15/131) was higher than the Ly-HE-positive cases (10/131). In 48 cases of intestinal-type cancer, Ly-IM had a PPV of 33.3% (2/6) and anNPV of 100% (42/42), which was more accurate than the corresponding figures for Ly-HE (25% and 98%, respectively). In contrast, the accuracy of Ly-IM was similar to that of Ly-HE in 83 cases of diffuse-type cancer.

Conclusion

Lymphatic vessels are most densely distributed in the MM layer in the gastric wall. Immunohistochemical identification of lymphatics is useful to increase the accuracy of diagnosing Ly in resected gastric EGCs. Ly-IM is superior to Ly-HE as a predictor of nodal metastasis, at least for intestinal-type EGC.

Key words

Gastric cancerLymphatic invasionD2-40Lymph node metastasisHistological type
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Copyright information

© International and Japanese Gastric Cancer Association 2006