4Herrera L, Villarreal JR. Incidence of metastases from rectal adenocarcinoma in small lymph nodes detected by a clearing technique. Dis Colon Rectum, 1992, 35 : 783.
5Moreira LF, Hizuta A, Iwagaki H, et al. Lateral lymph node dissection for rectal carcinoma below the peritoneal reflection. Br J Surg, 1994,81:293.
6Northover J. Carcinoembryonic antigen and recurrent colorectal cancer. Gut, 1986,27 : 117.
7Wiggers T, de Vries MR, Veeze-Kuypers B. Surgery for local recurrence of rectal carcinoma. Dis Colon Rectum, 1996,39:323.