Clinicopathological features of minute pharyngeal lesions diagnosed by narrow-band imaging endoscopy and biopsy

Table 1 Patient characteristics (n = 93)

Characteristics	No.
Age, yr (range)	67 (39-87)
Sex, men/women	80/13
Alcohol consumption
Yes	56 (54 men, 2 women)
No	30 (22 men, 8 women )
Smoker
Yes	57 (56 men, 1 woman)
No	29 (20 men, 9 women)
Esophageal cancer history
Yes	2
No	91
Other cancer history
Yes	9 (8 gastric cancer, 1 colon cancer)
No	84
Location
Hypopharynx	21 (17 men, 4 women)
Oropharynx	72 (63 men, 9 women)
Biopsy cases	62
High-grade dysplasia	3
Low-grade dysplasia	25
Non-dysplasia	34
ESD cases	17
High-grade dysplasia	2
Low-grade dysplasia	14
Non-dysplasia	1

ESD: Endoscopic submucosal dissection.