Modifiers matching viscera:

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

Simple categories matching thoracic:

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