SNOMED CT Editorial Advisory Group

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Inherently ambiguous FSN with multiple meanings

Multiple possible meanings:

  • Concept
    t269530002 |Ca lesser curvature - stomach (disorder)|
     has 3 possible meanings all of which exist within SNOMED CT:
  • Concept
    t254563009 |Carcinoma of lesser curve of stomach (disorder)|
  • Concept
    t269459004 |Malignant tumor of lesser curve of stomach (disorder)|
  • Concept
    t93867004 |Primary malignant neoplasm of lesser curvature of stomach (disorder)|

Resolution:

  • Inactivate 269530002 |Ca lesser curvature - stomach (disorder)| with the following target historical associations:
    • POSSIBLY_EQUIVALENT_TO 
      Concept
      t254563009 |Carcinoma of lesser curve of stomach (disorder)|
    • POSSIBLY_EQUIVALENT_TO 
      Concept
      t269459004 |Malignant tumor of lesser curve of stomach (disorder)|

    • POSSIBLY_EQUIVALENT_TO

      Concept
      t93867004 |Primary malignant neoplasm of lesser curvature of stomach (disorder)|


Inherently ambiguous FSN but not all reeplaceement concepts exist

Two possible meanings:

      

Concept
t237055002 |Polycystic ovary syndrome (disorder)|
 has 2 possible meanings one of which does not exist within SNOMED CT:

  • Polycystic ovary syndrome - available in SCT 
    Concept
    t237055002 |Polycystic ovary syndrome (disorder)|
  • Polycystic ovary - did not exist in SCT

Resolution:

  • Create a new concept: Polycystic ovary
  • Inactivate 69878008 |Polycystic ovaries (disorder)| with the following target historical associations:
    • POSSIBLY_EQUIVALENT_TO 
      Concept
      t781067001 |Polycystic ovary (disorder)|
    • POSSIBLY_EQUIVALENT_TO 
      Concept
      t237055002 |Polycystic ovary syndrome (disorder)|


Ambiguous concept that requires intermediate deprecated inactive concepts

Mixed ambiguity with conjunction:

  • Concept
    t199779004 |Persistent occipitoposterior or occipitoanterior position - delivered (disorder)|
     has 2 possible meanings, neither of which exist in SNOMED CT:
    • POSSIBLY_EQUIVALENT_TO xxxxxxxx Persistent occipitoanterior presentation and now delivered
    • POSSIBLY_EQUIVALENT_TO yyyyyyyy Persistent occipitoposterior presentation and now delivered
  • However, both of these are compound clinical statements that should not be added as active concepts but are required in order to satisfy the requirement to ensure clinically safe reporting of historical data.
  • In addition is is necessary to resolve the conjunction that arises from the original concept.

Resolution:

  • Create 2 new concepts:
    •  
      Concept
      txxxxxxxx Persistent occipitoposterior presentation and now delivered (finding)
    •  
      Concept
      tyyyyyyyy Persistent occipitoanterior presentation and now delivered (finding)

    • Inactivate 

      Concept
      t199779004 |Persistent occipitoposterior or occipitoanterior position - delivered (disorder)|
       as ambiguous

      • POSSIBLY_EQUIVALENT_TO xxxxxxxx Persistent occipitoanterior presentation and now delivered (disorder)
      • POSSIBLY_EQUIVALENT_TO yyyyyyyy Persistent occipitoposterior presentation and now delivered (disorder)
  • Now resolve the 2 conjunctions:
  • Inactivate 
    Concept
    txxxxxxxx Persistent occipitoposterior presentation and now delivered (disorder)
     as a Classification concept
    • EQUIVALENT_TO 
      Concept
      t90381008 |Occipitoanterior position (finding)|
    • EQUIVALENT_TO 
      Concept
      t236973005 |Delivery procedure (procedure)|
  • inactivate 
    Concept
    txxxxxxxx Persistent occipitoanterior presentation and now delivered (disorder)
    • EQUIVALENT_TO

Managing Incoming Historical Associations

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