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Alternatively, if a GCI-modeled parent will not subsume an appropriate child concept, then the GCI-modeled concept should be stated as a primitive supertype.

For example, 

781076008 |Metastatic malignant neoplasm to colon and/or rectum (disorder)| must have the GCI-modeled parent concept of Malignant neoplasm of colon and/or rectum (disorder), also shown in salmon pink, stated as a primitive supertype, or else the concept would not be subsumed by Malignant neoplasm of colon and/or rectum (disorder).  Because Metastatic malignant neoplasm to colon and/or rectum (disorder) is a disjunctive, it requires the GCI similar to its parent.  However, its subtypes of Metastatic malignant neoplasm to colon (disorder) and Metastatic malignant neoplasm to rectum (disorder) do not require either GCI-modeled concept as a stated parent, because each will be subsumed appropriately with a stated parent of Disease (disorder).  

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Finally, the example below of 82271004 |Injury of head (disorder)| illustrates a concept with a GCI-modeled supertype of 417163006 |Traumatic or non-traumatic injury (disorder)|. In this case, the concept Injury of head (disorder) is sufficiently defined.

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