Collaborative Stage for TNM 7 - Revised 01/27/2010 [ Schema ]
CS Site-Specific Factor 7
Primary Tumor Mitotic Count/Rate
- Note 1: According to CAP, "A mitotic rate of 1 or more mitotic figure per square millimeter is a powerful adverse prognostic factor for cutaneous melanoma."
- Note 2: Mitotic rate/count is assessed on all primary tumors and is tabulated as the average number of mitoses per square millimeter. The proportion of cells in a tissue that are undergoing mitosis are expressed as a mitotic index or, roughly, as the number of cells in mitosis in each microscopic high-power field in tissue sections.
- Note 3: Record the mitotic rate/count as documented in the pathology report.
- Note 4: If there is no documentation or no mention of mitotic rate in the pathology report, code 999.
|000||Mitotic rate <1 per square millimeter|
|001-010||1 - 10 mitoses per square millimeter |
Code exact measurement
001 = 1 mitosis per square millimeter
002 = 2 mitosis per square millimeter
010 = 10 mitoses per square millimeter
|011||11 mitoses per square millimeter or greater|
Information not collected for this case
|998||No histologic examination of primary site.|
Not documented in patient record