Missed diagnosis of early gastric cancer or high-grade intraepithelial neoplasia

Table 1 Missed diagnosis of early gastric cancer or high-grade intraepithelial neoplasia in different parts of the stomach n (%)

Locations	Total EGC/HGIN	Missed cases
Gastroesophageal junction	19	8 (42.10)a
Upper stomach body	12	2 (16.67)
Middle stomach body	11	3 (27.27)
Lower stomach body	14	2 (14.29)b
Antrum of stomach	33	5 (15.15)b
Gastric angle	14	3 (21.42)
Total	103	23 (22.33)

^aP < 0.05 vs non-missed diagnosis cases;

^bNo statistical differences. EGC: Early gastric cancer; HGIN: High-grade intraepithelial neoplasia.

Table 2 Early gastric cancer or high-grade intraepithelial neoplasia missed by endoscopists at our and other hospitals

Lesion locations	Other hospitals	Our hospital
Gastroesophageal junction	7	1
Upper stomach body	1	1
Middle stomach body	2	1
Lower stomach body	1	1
Antrum of stomach	2	3
Gastric angle	2	1
Total	15	8

Table 3 Number of biopsies and missed diagnosis n (%)

Biopsies	Missed cases
1	7 (30.43)
2	7 (30.43)
3	6 (26.09)
≥ 4	3 (13.64)
Total	23 (100.00)