Table 6.

Keywords with the strongest occurrence among top-500 cited articles (analysis by VOSviewer).

Rank	Keywords	Occurrences	Total link strength
1	Adenocarcinoma	192	510
2	High-grade dysplasia	118	319
3	Cancer	109	301
4	Diagnosis	78	259
5	Prevalence	72	239
6	Intestinal metaplasia	62	226
7	Dysplasia	75	221
8	Esophagogastric junction	56	215
9	Surveillance	64	221
10	Gastric cardia	54	187
11	Photodynamic therapy	56	170
12	Barretts-esophagus	92	167
13	Follow-up	46	158
14	Gastroesophageal reflux disease	52	158
15	Columnar-lined esophagus	39	142
16	Risk	43	142
17	Carcinoma	55	129
18	Barrett's esophagus	47	121
19	Esophagus	48	110
20	Early adenocarcinoma	41	97