Pseudomyxoma peritonei of 92 Chinese patients: Clinical characteristics, pathological classification and prognostic factors

Table 1 Clinicopathologic finding of 92 cases of pseudomyxoma peritonei n (%)

Index	DPAM	PMCA-I/D	PMCA	Total
No. of cases	49 (53.2)	26 (28.3)	17 (18.5)	92 (100.0)
Gender
Male	27	10	10	45 (48.9)
Female	22	16	7	47 (51.1)
Age (range, yr)	55.2 (22-79)	51.9 (24-76)	50.9 (31-75)	53.4 (22-79)
Operative times
≤ 2	34	18	12	64 (69.6)
> 2	15	8	5	28 (30.4)
Appendix
UR	1	0	1	2 (2.2)
UP	6	4	0	10 (10.9)
Appendicitis	1	1	1	3 (3.1)
LAMN	31	11	6	48 (52.2)
MACA	10	10	9	29 (31.5)
Architecture
Simple	15	0	0	15 (16.3)
FP	20	16	1	37 (40.2)
EP	4	10	4	18 (19.6)
Carcinomatous	0	0	12	12 (13.1)
Cytologic atypia
Minimal	45	12	1	58 (63.0)
Moderate	4	14	4	22 (23.9)
Marked	0	0	12	12 (13.1)
Mitosis
Rare	48	13	1	52 (56.5)
Occasional	1	10	7	18 (19.6)
Abundant	0	3	9	12 (13.1)
Organs involvment	2	3	10	15 (16.3)
Small intestine	11	1	52,3	7 (7.6)
Colon	0	1	33	4 (4.3)
Rectum	0	0	14	1 (1.1)
Urinary bladder	11	0	0	1 (1.1)
Liver	1	0	0	1 (1.1)
Uterus	0	1	14	2 (2.2)
Fallopian tube	0	0	1	1 (1.1)
Pleura	0	0	22	2 (2.2)
Ovarian involvment (n = 47)	13	12	7	32 (68.1)

^1,2,3,4Represents one case had two organ involvement. LAMN: Low-grade appendiceal mucinous neoplasm; MACA: Mucinous adenocarcinoma; UP: Unknown pathology; UR: Unresected; FP: Focally proliferation; EP: Extensively proliferation; DPAM: Disseminated peritoneal adenomucinosis; PMCA-I/D: Peritoneal mucinous carcinomatosis with intermediate or discordant features.

Table 2 Stepwise multivariate Cox proportional hazards regression analysis

Variable	β	Se (β)	Wald,χ2	P	RR	95% CI
Age	-0.943	0.473	3.984	0.046	0.39	0.154, 0.983
Pathologic classification	0.778	0.311	6.255	0.012	2.18	1.183, 4.006
Appendiceal tumor	0.723	0.331	4.765	0.029	2.06	1.077, 3.941

RR: Risk ratio; CI: Confidence interval.