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As an example, the SNOMED CT concept 235991007 |Peritoneal eosinophilia (disorder)|, may be identified as a type of blood disorder by some lexical (terming) coding tools and mapped to D72.8, Other specified disorders of white cells, in ICD-10. However, the concept 235991007 |Peritoneal eosinophila (disorder)| has defining relationships 213293008 |is a (attribute)| = 213293008 |Aseptic peritonitis (disorder)| with 116676008 |associated morphology (attribute)| = 23583003 |Inflammation (morphologic abnormality)| and 363698007 |finding site (attribute)| = 15425007 |Peritoneum (serous membrane) structure|. From these relationships, the Mapping Specialist identifies that the SNOMED CT concept is an inflammation of the peritoneum and appropriately maps the concept to the ICD-10 semantic space K65.8, Other peritonitis.