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. 2018 Dec 5;2018:330–339.

Figure 2.

Figure 2.

Examples showing how partitions of anatomical structures affect mappings between ICD-O topography codes and classes within the FMA. (A) An example in which the subdivision listed for an ICD-O code is consistent with the modeling within the FMA. (B) Three examples of inconsistencies in the modeling of parts. (B, top) The structure “Heart” is defined differently in the ICD-O and FMA, with the ICD-O definition including the pericardium. In the FMA, the pericardium is modeled as part of the pericardial sac, which attaches to the heart (instead of being part of the heart). (B, middle) The ICD-O divides the floor of mouth into anterior and lateral regions, while the FMA partitions it into anterior and posterior regions. (B, bottom) The ICD-O has a single code for skin of the scalp and neck. The FMA has separate classes for skin of neck and skin of scalp. Therefore, data labeled with this ICD-O code cannot be translated to classes in the FMA (but the FMA to ICD-O translation is possible).