This is Dr. David
I am a cancer doctor.
most often lung mets don't cause any lung symptoms.
pain increasing with inspiration is called pleuritic chest pain.
this can be due to irritation of your pleural lining from fluid or from prior scar tissue or sarcoma metastasis.
I would ask your doctor to move up your chest CT scan to this month to get a faster look now.
what might be better than a chest CT scan would be a PET/CT scan
let me know if you have other questions.
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