On multivariable analysis, tumor depth (T4) (p < 0.0041, HR 5.69, 95% CI 1.95–16.6) and high CHRNB2 (p = 0.0417, HR 2.83, 95% CI 1.03–16.6) were independent prognostic factors for peritoneal recurrence (Table 1). This evidence concerns the gene CHRNB2 and neoplasm.