Figure 1.

Five categories of term-based matches and mismatches found in mapping ICD-O topography codes to classes within the FMA. Preferred terms for both the ICD-O and FMA are in bold. Synonyms of preferred terms are shown when relevant. (A) Matches on preferred terms, with no apparent discrepancies. (B) Matches using synonyms, with no apparent discrepancies. (C) Matches based on lexical similarity of terms and context. (D) Mismatches resulting from matching on preferred terms. In the FMA these terms refer to anatomical spaces and 2D surfaces, not structures from which neoplasms can arise. Note that the “subclass of” (“is a”) relationships shown for the FMA classes condense several layers of the class hierarchy. (E) Examples where ICD-O preferred terms and their synonyms map to different classes within the FMA. “NOS” stands for “not otherwise specified”.