1. Sobin L, Gospodarowicz M, Wittekind C. TNM classification of malignant tumours. 7th ed. Hoboken, NJ: Wiley-Blackwell; 2009.
2. Isozaki H, Okajima K, Fujii K. Histological evaluation of lymph node metastasis on serial sectioning in gastric cancer with radical lymphadenectomy. Hepato-Gastroenterology. 1997;44:1133–6.
3. Natsugoe S, Aikou T, Shimada M, Yoshinaka H, Takao S, Shimazu H, et al. Occult lymph node metastasis in gastric cancer with submucosal invasion. Surg Today. 1994;24:870–5.
4. Noura S, Yamamoto H, Miyake Y, Kim B, Takayama O, Seshimo I, et al. Immunohistochemical assessment of localization and frequency of micrometastases in lymph nodes of colorectal cancer. Clin Cancer Res. 2002;8:759–67.
5. Maehara Y, Oshiro T, Endo K, Baba H, Oda S, Ichiyoshi Y, et al. Clinical significance of occult micrometastasis lymph nodes from patients with early gastric cancer who died of recurrence. Surgery. 1996;119:397–402.