Site-Specific Factor 7
Primary Tumor Mitotic Count/Rate
Notes
**Note 1:** Mitotic rate/count is assessed on primary melanomas, based on the number of mitotic figures in one square millimeter (mm) surrounding either a "hot spot" with the most mitotic figures or a field with a representative mitosis. **Note 2:** Record the mitotic rate/count as documented in the pathology report. * If there is more than one pathology report for the same melanoma at initial diagnosis and different mitotic counts are documented, code the highest mitotic count from any of the pathology reports * Use code 999 if there is no documentation or no mention of mitotic rate in any pathology report for the same melanomaDefault
999NAACCR Item
NAACCR #2861Metadata
None| Code | Description |
|---|---|
| 000 | 0 mitoses per square millimeter (mm) Mitoses absent No mitoses present |
| 001-010 | 1 - 10 mitoses/square mm (Exact measurement in mitoses/square mm) Examples: 001 1 mitosis per square mm 002 2 mitoses per square mm 010 10 mitoses per square mm |
| 011 | 11 or more mitoses per square mm |
| 988 | Not applicable: Information not collected for this case |
| 990 | Stated as "less than 1 mitosis/square mm" Stated as "nonmitogenic" |
| 991 | Stated as "at least 1 mitosis/square mm" Stated as "mitogenic" |
| 996 | Mitotic rate described with denominator other than square millimeter (mm) |
| 997 | Test performed, results not in chart Test performed, quantitative results not stated |
| 998 | No histologic examination of primary site |
| 999 | Unknown or no information Not documented in patient record |