Clinical relevance of fluorodeoxyglucose positron emission tomography/computed tomography and magnifying endoscopy with narrow band imaging in decision-making regarding the treatment strategy for esophageal squamous cell carcinoma

Table 1 Clinicopathological characteristics of patients

Variable	Total (n = 82)
Clinical variables
Sex
Male	63
Female	19
Age (yr), mean ± SD	64.7 ± 9.06
Tumor location
Upper thoracic	6
Middle thoracic	46
Lower thoracic	30
Circumferential extension
< 3/4	71
≥ 3/4	11
Macroscopic type
0-I	5
0-IIa	2
0-IIc	75
Primary treatment
EMR-C	7
ESD	57
Surgery	18
Depth of tumor invasion by, EP-LPM	49
NBI with magnification
MM-SM1	26
SM2-SM3	7
Lymph node metastasis
Positive	3
Negative	79
Pathological variables
Depth of tumor invasion
pTis	4
pT1a	61
pT1b	17
Diameter of primary tumor (mm), mean ± SD	30.5 ± 18.5
Lymph node metastasis
Positive	8
Negative	10
Infiltrative growth pattern
INFa	50
INFb	32
Histological grade
Well	30
Moderate	47
Poor	5
Vascular invasion
Positive	15
Negative	67
Lymphatic invasion
Positive	19
Negative	63

SD: Standard deviation; EMR-C: Endoscopic mucosal resection using a cap-fitted endoscope; ESD: Endoscopic submucosal dissection; EP: Mucosal epithelium; LPM: Lamina propria mucosae; MM: Muscularis mucosae; SM1: Upper third of the submucosal layer; SM2: Middle third of the submucosal layer; SM3: Lower third of the submucosal layer; INF: Infiltrative growth pattern.