Preoperative neutrophil-to-lymphocyte ratio (preNLR) for the assessment of tumor characteristics in lung adenocarcinoma patients with brain metastasis.

However, there is no meaningful main effect emerged with both Brain metastasis location ( F = 0.705; P = 0.535) and peritumoral brain edema ( F = 1.053; P = 0.428), which indicated a possible trend toward severe peritumoral edema for higher preNLR.

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