A Real-world Study on the Treatment of Non-small Cell Lung Cancer With Leptomeningeal Metastasis in China

This is a real-world observational study that collects data on patients in China who have non-small cell lung cancer (NSCLC) that has spread to the membranes lining the brain and spinal cord — a condition called leptomeningeal metastasis. The goal is to understand what treatments are being used and how well they work in everyday clinical practice. **You may be eligible if...** - You have non-small cell lung cancer with leptomeningeal metastasis diagnosed after January 2018 - You received anti-cancer treatment after your leptomeningeal metastasis was diagnosed **You may NOT be eligible if...** - You have small cell lung cancer (or your tumor has small cell components mixed in) - You have another type of cancer in addition to NSCLC Talk to your doctor to see if this trial is right for you.