Leptomeningeal Metastasis in Patients With EGFR-positive NSCLC: A Propensity-matched Retrospective Study of Patients With EGFR-negative NSCLC

LM has been attracting attention, possibly due to the long-term survival achieved by <i>EGFR</i>-tyrosine kinase inhibitors. Additional information is required to clarify the risk of LM.