Metastatic Disease to Lungs

Metastatic disease to the lungs typically presents as multiple pulmonary nodules. Metastatic lesions are usually round with sharply demarcated borders but hemorrhagic lesions can have fuzzy margins. Cavitation is rare and occurs in less than 5% of lesions.

Case #1a. Cannonballs on chest radiograph in patient with metastatic thyroid cancer.
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Case #1b. Same patient as above: massive intrathoracic tumor burden demonstrated on chest CT.

Case #2. Multiple pulmonary nodules in metastatic melanoma.