arXiv AI By Yiran Zeng, Giacomo Frisoni, Lorenzo Molfetta, Gianluca Moro

Are We Done with UMLS Injection into Language Models for Medical Question Answering?

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The paper questions the effectiveness of injecting the Unified Medical Language System (UMLS) into language models for medical question answering (MQA). It reviews current MQA studies, identifies methodological shortcomings such as limited UMLS coverage and weak subgraph retrieval, and finds that UMLS-based graph injection often yields only modest performance gains. The authors propose actionable recommendations to better harness UMLS as an external knowledge source.

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