Information about the 2007 Histology Coding Rules

Note: Do not use these rules to determine case reportability. To review the discussion, go to When & How to Use the New Rules Section 3.

  1. The 2007 multiple primary rules replace all previous multiple primary rules. To review the discussion, go to Overview: What The 2007 Rules Are. and Major Changes.
  2. The rules are effective for cases diagnosed January 1, 2007 and after. Do not use these rules to abstract cases diagnosed prior to January 1, 2007. To review the discussion, go to Overview: What The 2007 Rules Are and Major Changes.
  3. The histology coding rules are available in three formats: flowchart, text, and matrix. The rules are identical, only the formats differ. Use the set of rules in the format that is easiest for you to follow.To review the discussion, go to Formats.
  4. Notes and examples are included with some of the rules to highlight key points or to add clarity to the rules.To review the discussion, go to When & How to Use the New Rules Section 5.
  5. Rules are in hierarchical order within each section (Single Tumor and Multiple Tumors Abstracted as a Single Primary).To review the discussion as it applies to the multiple primaries rules, go to Part When & How to Use the New Rules, "Priority of Multiple Primaries Rules".