Gastric mucosal prolapse or gastroesophageal intussusception.
D003937:Diagnosis, Differential; D004935:Esophageal Diseases / Q000175:diagnosis*; D005753:Gastric Mucosa / Q000175:diagnosis*; D006801:Humans; D007443:Intussusception / Q000175:diagnosis*; D013272:Stomach Diseases / Q000175:diagnosis*