From the case:
Thoracic lymph node stations (annotated CT)
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Axial C+ arterial phase

CT atlas of thoracic lymph node stations as defined by IASLC, with ambiguous regions designated as per El-Sherief et al. 2014 1.
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Axial C+ arterial phase

Relevant anatomical landmarks have been labeled above. The following abbreviations are used:
- Ao: aorta
- SVC: superior vena cava
- LPA: left pulmonary artery
- RPA: right pulmonary artery
- Az v: azygous vein
- RUL br: right upper lobe bronchus
- LLL br: left lower lobe bronchus
- Left CC a: left common carotid artery