Operation on stomach (procedure)

• Gastric operation
• Operation on stomach
• Stomach operation

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

• Operative procedure on digestive organ (procedure)
• Procedure on stomach (procedure)
• Operation on abdominal region (procedure)
• Upper gastrointestinal operation (procedure)