CEACAM5 and gastric cancer: Since this report, many investigators have concurred that CEA mRNA levels represent an accurate retrospective determination of the risk of peritoneal recurrence in patients with gastric cancer (Yonemura et al, 2001; Fujii et al, 2002; Marutsuka et al, 2003; Tokuda et al, 2003; Ueno et al, 2003; Oyama et al, 2004).