Table 2: Surgical procedures performed in the 2 groups.

Patients Controls Surgical procedures  Complete omentectomy 25* —  Hepatic round ligament resection 25* —  Left hemicolectomy 13 29  Appendectomy 10* —  Right hemicolectomy 9 15  Bilateral adnexectomy 6* 1°§  Transverse colon resection 3 6  Cholecystectomy 2§ 2§  Abdominal wall resection 2° 3°  Small bowel resection 2° 3°  Right adnexectomy 1* 1°  Hysterectomy 1§ 1°  Total, mean per patient 99–3.9 61–1.2

*Procedures performed according to the study protocol. °Procedures performed for the tumor direct invasion. §Procedures performed for the coexisting benign disease.