The esophagogastric junction.
Goldblum
J R
JR
D000293:Adolescent; D002299:Cardia / Q000033:anatomy & histology / Q000166:cytology / Q000473:pathology; D004943:Esophagogastric Junction / Q000033:anatomy & histology* / Q000166:cytology / Q000473:pathology; D005753:Gastric Mucosa / Q000166:cytology / Q000473:pathology; D005764:Gastroesophageal Reflux / Q000473:pathology; D006801:Humans