LF2L: Loss Fusion Horizontal Federated Learning Across Heterogeneous Feature Spaces Using External Datasets Effectively: A Case Study in Second Primary Cancer Prediction
This paper proposes a Loss Fusion Horizontal Federated Learning (LF2L) framework that effectively integrates heterogeneous external SEER data with local Taiwanese hospital records to significantly improve the prediction accuracy of second primary lung cancer while preserving patient privacy and addressing feature inconsistencies.