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Differential of an enlarged pulmonary trunk on chest radiography

Dr Jeremy Jones and Dr Frank Gaillard et al.

The differential of an enlarged pulmonary trunk / main pulmonary artery on chest radiography includes:

normal
- may appear prominent in young patients especially women
projectional
- rotation
- lordotic view
rotation of heart
- pectus excavatum
- left lower lobe collapse
pulmonary arterial hypertension (PAH)
pulmonary embolism
post stenotic dilatation
- pulmonary valve stenosis
- pulmonary artery coarctation
increased pulmonary blood flow
- left to right shunt
- total anomalous pulmonary venous return (TAPVR)
- pregnancy
- high output cardiac failure
  - thyrotoxicosis
  - anaemia
Marfan syndrome
mimics
- enlarged left atrial appendage
- left hilar / mediastinal mass

References

Synonyms & Alternative Spellings

Synonyms or Alternative Spelling	Include in Listings?
Enlarged pulmonary trunk on chest radiography	✓
Enlarged pulmonary trunk on CXR	✗
Differential of enlarged pulmonary artery (main segment) on chest radiography	✗
Differential of enlarged pulmonary artery (main segment) on CXR	✗
Differential for an enlarged pulmonary trunk on chest radiography	✗