In univariable analysis, tumor size (≥40 mm) (p = 0.0293, HR 4.03, 95% CI 1.15–14.2), high CEA (p = 0.0167, HR 3.44, 95% CI 1.25–9.49), tumor depth (T4) (p < 0.0001, HR 9.27, 95% CI 3.36–25.6), and high CHRNB2 (p = 0.0173, HR 3.29, 95% CI 1.23–8.79) were prognostic factors for peritoneal recurrence. The gene discussed is CHRNB2; the disease is neoplasm.