Operation on esophagus (procedure)

• Esophageal operation (including hiatus hernia)
• Esophagus operation
• Oesophageal operation (including hiatus hernia)
• Oesophagus operation
• Operation on esophagus
• Operation on oesophagus

• Procedure on esophagus (procedure) and Role group (attribute) some (
      Method (attribute) some Surgical action (qualifier value) and
      Procedure site (attribute) some Esophageal structure (body structure))

• Operative procedure on digestive organ (procedure)
• Procedure on esophagus (procedure)
• Upper gastrointestinal operation (procedure)