Modifiers matching viscera:

• key,
• abdominal,
• hollow,
• exposed,
• surrounding,
• adjacent,
• large,
• major,
• ordinary,
• developing,
• deep,
• fixed,
• thoracic,
• solid,
• normal,
• nearby,
• pelvic,

Simple categories matching thoracic:

• organs,
• procedure,
• surgery,
• structure,
• vessel,
• viscera,
• vein,
• cavity,
• region,
• problem,
• abnormality,