Metastatic lung cancer. Coloured positron eletron tomography (PET) scans through the chest of a patient with lung cancer (red/yellow) in the lower left lung. The cancer has spread (metastasised) to the kidneys (yellow, lower centre), where the cancerous cells will resemble those from the lung (primary cancer). Treatment of metastasised cancers include a combination of radiotherapy, chemotherapy and surgery, and depends on the type of primary cancer, as well as the size and location of the metastasised cancer.
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