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Metastatic patterns for the high-grade LCNEC and SCLC patients with stage IV recorded between 2010 and 2014. The differences in bone, brain and liver metastases between high-grade LCNEC and SCLC patients were analyzed using a Chi-square test. Abbreviations: LCNEC, large cell neuroendocrine carcinoma; SCLC, small cell lung carcinoma.
