Assertion: lung cancer's stage | /r/UsedFor | refer to any lung cancer of any size
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Source sentences:
text: Stage 4 non-small cell lung cancer (metastatic lung cancer) is the most advanced stage of lung cancer and refers to any lung cancer of any size that has spread (metastasized) to another region of the body, to another lobe of the contralateral lung, or is accompanied by a malignant pleural effusion.