CTICasesSBRT Radiation Pneumonitis
Imaging findings
A right lower lobe adenocarcinoma nodule was initially seen at time point one. At time point two, three months later, the nodule shows a peripheral halo of ground glass opacity, a rounded appearance, and traction bronchiectasis. This represents developing radiation pneumonitis and organizing pneumonia.
Key takeaways
It is always important to know a patient's treatment history. This degree of growth in three months is atypical for tumor progression but characteristic for the subacute appearance of SBRT (stereotactic body radiotherapy) radiation pneumonitis. SBRT-induced pneumonitis tends to have a 'bowl' of fibrosis/pneumonitis rather than a straight edge, unlike conventional beam radiotherapy.
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