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Survival difference for patients with specific primary location according to different metastasis patterns. Kaplan–Meier curves for patients with primary location in (a) the main bronchus based on different metastasis patterns; (b) the upper lobe based on different metastasis patterns; (c) the lower lobe based on different metastasis patterns; (d) the middle lobe based on different metastasis patterns; (e) overlapping lesions based on different metastasis patterns.
