Study of preoperative diagnostic modalities in Chinese patients with superficial esophageal squamous cell carcinoma

Table 1 Clinicopathological features of patients and lesions

Variable	152 lesions in 144 patients
Sex, n (%)
Male	108 (75.0)
Female	36 (25.0)
Age, average ± SD, yr	61.3 ± 7.5
Location, n (%)
Cervical esophagus	2 (1.3)
Upper thoracic esophagus	13 (8.6)
Middle thoracic esophagus	82 (53.9)
Lower thoracic esophagus	55 (36.2)
Macroscopic type, n (%)
Elevated	60 (39.5)
Flat	90 (59.2)
Depressed	2 (1.3)
Mean tumor size, range, mm	22.9 (5-60)
Circumferential occupation, n (%)
< 1/4	38 (25)
1/4-1/2	51 (33.6)
1/2-3/4	37 (24.3)
≥ 3/4	26 (17.1)
Time interval between examination and resection, d, range	18 (1-82)
Treatment, n (%)
Endoscopic resection	71 (46.7)
Surgery	81 (53.3)
Differentiation degree, n (%)
HGIN or carcinoma in situ	60 (39.5)
Poor	13 (8.6)
Moderate	72 (47.4)
Good	7 (4.6)
Depth according to pathological diagnosis, n (%)
EP/LPM	78 (51.3)
MM/SM1	28 (22.4)
SM2/SM3	46 (30.3)

SD: Standard deviation; HGIN: High-grade intraepithelial neoplasia; EP: Epithelium; LPM: Lamina propria mucosa; MM: Muscularis mucosa; SM: Submucosa.