Alternate Name | Item# | Length | Source of Standard | Column # |
---|---|---|---|---|
1971 | 4 | SEER | 1913-1916 |
For cases diagnosed before 1992, contains the ICD-O-1 or field trial 4-digit histology code as originally coded, if available. Blank for tumors coded directly into ICD-O-2 or ICD-O-3 (i.e., 1992 and later cases). |