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Inherently ambiguous FSN with multiple meanings

Multiple possible meanings:

Concept
t 269530002 |Ca lesser curvature - stomach (disorder)|
has 3 possible meanings all of which exist within SNOMED CT:
Concept
t 254563009 |Carcinoma of lesser curve of stomach (disorder)|
Concept
t 269459004 |Malignant tumor of lesser curve of stomach (disorder)|
Concept
t 93867004 |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
  t 254563009 |Carcinoma of lesser curve of stomach (disorder)|
- POSSIBLY_EQUIVALENT_TO
  Concept
  t 269459004 |Malignant tumor of lesser curve of stomach (disorder)|
- POSSIBLY_EQUIVALENT_TO
  Concept
  t 93867004 |Primary malignant neoplasm of lesser curvature of stomach (disorder)|

...

Inherently ambiguous FSN but not all replacement concepts exist

Two possible meanings:

Concept

t	237055002 \|Polycystic ovary syndrome (disorder)\|

has 2 possible meanings one of which does not exist within SNOMED CT:

Polycystic ovary syndrome - available in SCT
Concept
t 237055002 |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
  t 781067001 |Polycystic ovary (disorder)|
- POSSIBLY_EQUIVALENT_TO
  Concept
  t 237055002 |Polycystic ovary syndrome (disorder)|

...

Ambiguous concept that requires intermediate deprecated inactive concepts

Mixed ambiguity with a conjunction:

Concept
t 199779004 |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, it is necessary to resolve the conjunction that arises from the original concept.

Resolution:

Create 2 new concepts:
- Concept
  t xxxxxxxx Persistent occipitoposterior presentation and now delivered (finding)
- Concept
  t yyyyyyyy Persistent occipitoanterior presentation and now delivered (finding)
- Inactivate
  Concept
  t 199779004 |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
  t xxxxxxxx Persistent occipitoposterior presentation and now delivered (disorder)
  as a Classification concept
  - EQUIVALENT_TO
    Concept
    t 37235006 |Occipitoposterior position (finding)|
  - EQUIVALENT_TO
    Concept
    t 236973005 |Delivery procedure (procedure)|
- inactivate
  Concept
  t xxxxxxxx Persistent occipitoanterior presentation and now delivered (disorder)
  as a Classification concept
  - EQUIVALENT_TO
    Concept
    t 90381008 |Occipitoanterior position (finding)|
  - EQUIVALENT_TO
    Concept
    t 236973005 |Delivery procedure (procedure)|

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