On September 7, 2026, researchers released the Real-World Multi-Modal and Longitudinal Lung Cancer Dataset. This dataset includes whole-slice images, CT scans, and PET scan images of 1,365 lung cancer patients, as well as structured clinical data, transcriptomic data, and longitudinal treatment information. There are significant cross-modal missing values in the data. The study provided single-modal and multi-modal benchmark tests for predicting 12-month overall survival, disease-specific survival, and risk under severe missing data conditions. Results showed that integrating complementary modalities improved prediction performance more than using a single-modal approach. The dataset and benchmark code have been released on the GitHub platform.