Comparison of non-schistosomal rectosigmoid cancer and schistosomal rectosigmoid cancer

Table 1 Patient characteristics and colonoscopic findings n (%) or mean ± SD

	With schistosomiasis	Without schistosomiasis
	(n = 26)	(n = 34)	P value
Gender male/female	18/8	22/12
Age (yr)	60.7 ± 10.6	63 ± 8.7	0.6100
CEA	4.2 ± 8.8	82.9 ± 428.1	0.3800
CA19-9	10.9 ± 306.5	35.1 ± 65.1	0.1300
CA-125	27.4 ± 3.3	12.7 ± 10.0	0.0001
Preoperative biopsy
Carcinoma	7 (26.9)	16 (47.1)
Hyperplastic polyps	5 (19.2)	8 (23.5)
Villous adenoma	3 (11.5)	1 (2.9)
Tubular adenoma	3 (11.5)	1 (2.9)	0.3400
Others	8 (30.7)	8 (23.5)
Morphology
Congestive, Ulcerative	6 (23.1)	13 (38.2)
Fungating mass	12 (46.2)	8 (23.5)	0.1600
Cauliflower-like mass	6 (23.1)	6 (17.6)
Annular	2 (7.6)	7 (20.6)
Tumor stage
I	16 (61.5)	6 (17.6)
II	6 (23.1)	10 (29.4)	0.0030
III	4 (15.4)	17 (50)
IV	0	1 (2.9)
Differentiation
Well	16 (61.5)	15 (44.1)
Moderate	7 (26.9)	16 (47.1)	0.4000
Poor	3 (11.5)	3 (8.8)
Postoperative pathology
Adenocarcinoma	16 (61.5)	30 (88.2)
Signet-ring cell carcinoma	7 (7.7)	0	0.1300
Mucinous adenocarcinoma	3 (30.8)	4 (11.8)

Table 2 Laparoscopic surgery findings and pathological characteristics n (%)

	Male, n	Female, n	Total
Schistosomal ova position
Submucosa infiltration	12	6	18 (69.2)
Muscularis propria	4	1	5 (19.2)
Serosal infiltration	2	1	3 (11.5)
Infiltration in the sLNs	1	1	2
Intra-tumor tissue	14	7	21 (80.8)
Para-tumor tissue	4	1	5 (19.2)
Calcification ova (CT)	15	7	22 (84.6)
Irregular thickening of the intestinal wall	17	8	25 (96.2)
Rough serosal surface	2	1	3 (11.5)

CT: Computed tomography; sLNs: Surrounding lymph nodes.