Primary adenosquamous carcinoma of the esophagus

Table 4 Comparison of clinicopathological variables between patients with esophageal adenosquamous carcinoma and those with squamous cell carcinoma

Variable	ASC	SCC				P value
		Well differentiated (n = 1011)	Moderately differentiated (n = 2007)	Poorly differentiated (n = 421)	Total (n = 3439)
Gender						0.191
Male	31	748	1473	313	2534
Female	6	263	534	108	905
Age (yr)						0.056
≤ 60	19	672	1347	270	2289
> 60	18	339	660	151	1150
Location						0.647
Ut	3	124	284	54	462
Mt	29	746	1426	303	2475
Lt	5	141	297	64	502
Tumor length						0.182
≤ 4 cm	19	397	799	191	1387
> 4 cm	18	614	1208	230	2052
pT category						0.409
pTis	0	10	17	5	32
pT1a	0	18	35	10	63
pT1b	4	39	88	22	149
pT2	4	202	350	80	632
pT3	23	562	1135	232	1929
pT4a	5	139	278	68	485
pT4b	1	41	84	24	149
pN category						0.187
pN0	17	587	1049	212	1848
pN1	14	235	530	110	875
pN2	3	151	328	69	548
pN3	3	38	100	30	168
Adjuvant radiotherapy						1.000
No	27	729	1465	292	2486
Yes	10	282	542	129	953
Operation						0.755
Radical	34	945	1851	385	3181
Palliative	3	66	156	36	258

ASC: Adenosquamous carcinoma; SCC: Squamous cell carcinoma; Ut: Upper third of thoracic esophagus; Mt: Middle third of thoracic esophagus; Lt: Lower third of thoracic esophagus.