NAACCR XML: Tumor.multiplicityCounter
Description
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.
Rationale
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.
| 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.