Tumor Size Summary
This input is used for staging
Breast
Notes
**Note:** Exception to rounding rules for **BREAST** primaries: Round tumor sizes greater than 1.0 mm and up to 2.4 mm to 2 mm (002). The purpose of this exception is so that the size recorded in the Tumor Size field will derive the correct AJCC TNM Primary Tumor (T) category for breast primaries. Do **not** apply this instruction to any other site. For this schema, Tumor Size is used with EOD Primary Tumor to derive EOD T. See the [SEER Program Coding Manual](https://seer.cancer.gov/tools/codingmanuals/index.html) for coding instructions.Default
999NAACCR Item
NAACCR #756| Code | Tumor Size Description |
|---|---|
| 000 | No mass/tumor found |
| 001 | 1 mm or described as less than 1 mm |
| 002-988 | Exact size in millimeters (2 mm to 988 mm) |
| 989 | 989 millimeters or larger |
| 990 | Microscopic focus or foci only and no size of focus is given |
| 998 | Alternate descriptions of tumor size for specific sites: Familial/multiple polyposis: - Rectosigmoid and rectum (C19.9, C20.9) - Colon (C18.0, C18.2-C18.9) If no size is documented: Circumferential: - Esophagus (C15.0-C15.5, C15.8-C15.9) Diffuse; widespread: 3/4s or more; linitis plastica: - Stomach and Esophagus GE Junction (C16.0-C16.6, C16.8-C16.9) Diffuse, entire lung or NOS: - Lung and main stem bronchus (C34.0-C34.3, C34.8-C34.9) Diffuse: - Breast (C50.0-C50.6, C50.8-C50.9) |
| 999 | Unknown Size not stated Not documented in medical record Size of tumor cannot be assessed Not applicable |