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Strategies for Mapping Concepts in Gastrointestinal Endoscopy Reports to the UMLS Metathesaurus
Automatic access to information in clinical free text can provide support for medical decision support, outcome research, continuous quality improvement, and information retrieval. We discuss three strategies to improve results when using MetaMap to map strings in gastrointestinal endoscopy (GIE) reports to concepts in the Unified Medical Language System (UMLS) Metathesaurus. Due to word sense ambiguity, synonymy, and context-specific meaning, using MetaMap without modification produces limited results in this domain.