Table 1.

Patient characteristics

	Sensitive group	Resistant group	p
Sex
Male	26	25
Female	7	6	0.649
Age	65.3 ± 9.9	65.7 ± 10.2	0.468
Histology
pap	0	0
tubl	3	2
tub2	9	9
porl	5	9
por2	8	7
sig	5	3
muc	1	1
endocrine	2	0	0.891
Cycle of chemotherapy	6.7 ± 5.3	6.0 ± 2.8	0.379
Primary tumor
Palliatively resected (metastatic lesions remain)	28	24
Unresected	4	5
Recurrent	1	2	0.422
Chemotherapy regimen
TXT + S-1	20	11
CPT-11 + S-1	10	10
S-l	3	10	0.017

pap Papillary adenocarcinoma, tub1 well-differentiated tubular adenocarcinoma, tub2 moderately differentiated tubular adenocarcinoma, por1 poorly differentiated adenocarcinoma, solid type, por2 poorly differentiated adenocarcinoma, non-solid type, sig signet-ring cell carcinoma, muc mucinous adenocarcinoma, endocrine endocrine carcinoma, palliatively resected primary tumor was resected but metastatic lesions remained, unresected not possible to resect the primary tumor; chemosensitivity test performed with biopsy specimens, recurrent metastatic lesions were resected; metastatic lesions were resected and subjected to the chemosensitivity test