Table 1.

Profiles of patients.

Patient no.	Age	Sex	Chief complaints (initial symptoms)	Preoperative diagnosis	Diameter of appendix (mm)	CEA (<6.0 ng/mL)	CA19-9 (<37.0 U/mL)
1	59	Female	Abdominal distension	Suspicious PMP	18	24.5	143.9
2	54	Male	Lower abdominal pain	Suspicious PMP	64	11.3	79.2
3	49	Female	Lower abdominal mass	Suspicious PMP	32	5.1	49.2
4	54	Male	None (serum CEA elevation)	Appendiceal tumor	7	54	17.4
5	44	Female	Abdominal pain	Suspicious PMP	35	87.9	540.4
6	58	Female	None (abnormal findings on US)	Suspicious PMP	14	26.1	148.4
7	67	Male	Right inguinal mass and pain	Suspicious PMP	50	4.5	7.9
8	56	Female	None (abnormal findings on US)	Appendiceal tumor	22	3.1	36.6
9	63	Female	Lower abdominal distension	Suspicious PMP	25	2.1	18.5
10	42	Male	None (abnormal findings on CT)	Suspicious PMP	19	46.5	137.6
11	60	Female	None (abnormal findings on US)	Suspicious PMP	11	33.4	91.9