Preoperative marking of the proximal resection margin in esophageal cancer with a surgical fiducial marker: First experiences

Table 2 Histopathology and operation details, n (%)/mean ± SD

Characteristic	Study population n = 10
Tumor type: Adenocarcinoma	8 (80)
Tumor type: Mixed neuroendocrine non-neuroendocrine neoplasm	1 (10)
Tumor type: Mucoepidermoid carcinoma	1 (10)
pT11	4 (40)
pT2	1 (10)
pT3	5 (50)
pN01	5 (50)
pN1	3 (30)
pN2	2 (20)
Tumor regression scoring according to Mandard, 2	3 (30)
Tumor regression scoring according to Mandard, 3	4 (40)
Tumor regression scoring according to Mandard, 4	1 (10)
Tumor regression scoring according to Mandard, 5	1 (10)
No neoadjuvant treatment	1 (10)
Tumor size in millimeters	32.7 ± 23.8
Palpable tumor, yes	7 (70)
Palpable tumor, no	3 (30)
Microscopic distance to proximal tumor resection line, mm	37.3 ± 17.9
Macroscopic distance to proximal tumor resection line, mm	45.3 ± 17.3
R0 resection	10 (100)
R1 resection	0 (0)
Barrett’s dysplasia in resected tissue	2 (20)
No Barrett’s dysplasia in resected tissue	8 (80)

¹TNM classification of malignant tumors.