Table 1. Distribution of patients with carcinoma of the cardia (n=100) according to Siewert topographical and various histological classification systems and 5-year survival rate (%).

Classification of tumours	No.	5-year survival rate (%)
Lauren classification
Intestinal	83	24.1
Diffuse	13	6.3
Mixed	3	0
WHO classification
Papillary	49	20.8
Tubular	7	42.9
Mucinous	9	11.1
Signet ring cell	18	23.5
Undifferentiated	17	17.7
Grading
Well differentiated	9	55.6
Medium differentiated	48	19.2
Poorly differentiated	43	16.7
Goseki classification
Type I	34	26.5
Type II	33	18.8
Type III	20	26.3
Type IV	13	7.7
TNM staging
T
T1	20	52.6
T2	45	20.5
T3	22	4.6
T4	13	7.7
N
NO	43	41.5
N+	57	7.0
Stage
Stage I	39	43.2
Stage II	25	8
Stage III	35	8.6
Stage IV	1	0
Siewert classification
Type I	5	40
Type II	54	19.2
Type III	41	22