Zenker's diverticulum.
D000368:Aged; D004240:Diverticulum / Q000209:etiology / Q000601:surgery*; D004936:Diverticulum, Esophageal / Q000209:etiology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010608:Pharyngeal Diseases / Q000209:etiology / Q000601:surgery*; D012008:Recurrence; D012189:Retrospective Studies