Consolidation can be ruled out because this happens when the alveoli become filled with material and should be picked if there were signs of pneumonia or pulmonary edema. There would also be a history of proof on a chest X-ray.
Radiation pneumonitis can cause fibrosis and scarring, which is key for contraction atelectasis.
shak360Atelectasis is the loss of lung volume due to inadequate expansion of air space. Contraction atelectasis can be caused by radiation due to local or general fibrotic changes in the lung or pleura which limits the full expansion of lung volume. See this question in NBME 18.+
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Types of atelectasis
Consolidation can be ruled out because this happens when the alveoli become filled with material and should be picked if there were signs of pneumonia or pulmonary edema. There would also be a history of proof on a chest X-ray.
Radiation pneumonitis can cause fibrosis and scarring, which is key for contraction atelectasis.