| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 446 | 2 | SEER | 2006 | 11 |
This data item is used to count the number of tumors (multiplicity) that are reported as a single primary, when present at the time of diagnosis or occurring later.
Patients with multiple tumors reported as a single primary for surveillance purposes may have a worse prognosis or more extensive treatment than patients with a single tumor. This data item will make it possible to identify important information about these cases for data analysis.
Codes (refer to http://seer.cancer.gov/tools/mphrules/index.html for additional instructions).
| 00 | No primary tumor identified |
| 01 | One tumor only |
| 02 | Two tumors present; bilateral ovaries involved with cystic carcinoma |
| 03 | Three tumors present |
| .. | |
| .. | |
| 88 | Information on multiple tumors not collected/not applicable for this site |
| 89 | Multicentric, multifocal, number unknown |
| 99 | Unknown if multiple tumors; not documented |
| Blank | Information not collected for this diagnosis date (e.g., all cases diagnosed prior to 2007) |
Note: Codes 00 and 89 were added effective for 2011.