Analysis of the causes of failure after radical surgery in patients with PT3N0M0 thoracic esophageal squamous cell carcinoma and consideration of postoperative radiotherapy

Table 2 Analysis of recurrence pattern of different lesion locations N (%)

	Total No.	Upper thoracic portion(33)	Middle thoracic portion (153)	Lower thoracic portion(41)	Χ²	P
Sup.LN	12	4(12.1%)	7(4.6%)	1(2.4%)	4.532	0.104
Med.LN	39	9(27.3%)	26(17.0%)	4(9.8%)	3.954	0.138
Abd. LN	10	0(0%)	6(3.9%)	4(9.8%)	4.393	0.111
Ana.	6	1(3.0%)	3(2.0%)	2(4.9%)	1.092	0.579
Tumor site	5	0(0%)	4(2.6%)	1(2.4%)	0.874	0.646

Note: Sup: supraclavicular; Med.: mediastinal; Abd.: abdominal; Ana.: anastomotic; LN: lumph node. Overlapped recurrence pattern led to double counting of the number of patients with different recurrent sites (that is, the cumulative cases)

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