DATA FORM FOR CANCER STAGING - BREAST
Form # 785-1-037
| CLIN | PATH | DEFINITIONS | |||||
| PRIMARY TUMOR (T) | |||||||
| TX | Primary tumor cannot be assessed | ||||||
| T0 | No evidence of primary tumor | ||||||
| Tis | Carcinoma in situ: Intraductal carcinoma, lobular carcinoma in situ, or Paget's disease of the nipple with no tumor | ||||||
| T1 | Tumor 2 cm or less in greatest dimension | ||||||
| T1a | 0.5 cm or less in greatest dimension | ||||||
| T1b | More than 0.5 cm but not more than 1 cm in greatest dimension | ||||||
| T1c | More than 1 cm but not more than 2 cm in greatest dimension | ||||||
| T2 | Tumor more than 2 cm but not more than 5 cm in greatest dimension | ||||||
| T3 | Tumor more than 5 cm in greatest dimension | ||||||
| T4 | Tumor of any size with direct extension to chest wall or skin | ||||||
| T4a | Extension to chest wall | ||||||
| T4b | Edema (including peau d'orange) or ulceration of the skin of breast or satellite skin nodules confined to same breast | ||||||
| T4c | Both T4a and T4b | ||||||
| T4d | Inflammatory carcinoma | ||||||
| LYMPH NODE (N) | |||||||
| NX | Regional lymph nodes cannot be assessed (e.g. previously removed) | ||||||
| N0 | No regional lymph node metastasis | ||||||
| N1 | Metastasis to movable ipsilateral axillary lymph node(s) | ||||||
| N2 | Metastasis to ipsilateral axillary lymph node(s) fixed to one another or to other structures | ||||||
| N3 | Metastasis to ipsilateral internal mammary lymph node(s) | ||||||
| PATHOLOGIC CLASSIFICATION (PN) | |||||||
| PNX | Regional lymph nodes cannot be assessed (e.g. previously removed, or not removed for pathologic study) | ||||||
| pN0 | No regional lymph node metastasis | ||||||
| pN1 | Metastasis to movable ipsilateral axillary lymph node(s) | ||||||
| pN1a | Only micrometastasis (none larger than 0.2 cm) | ||||||
| pN1b | Metastasis to lymph nodes, any larger than 0.2 cm | ||||||
| pN1bi | Metastasis in 1 to 3 lymph nodes, any more than 0.2 cm and all less than 2 cm in greatest dimension | ||||||
| pN1bii | Metastasis to 4 or more lymph nodes, any more than 0.2 cm and all less than 2 cm in greatest dimension | ||||||
| pN1biii | Extension of tumor beyond the capsule of a lymph node metastasis less than 2 cm in greatest dimension | ||||||
| pN1biv | Metastasis to a lymph node 2 cm or more in greatest dimension | ||||||
| pN2 | Metastasis to ipsilateral axillary lymph nodes that are fixed to one another or to other structures | ||||||
| pN3 | Metastasis to ipsilateral internal mammary lymph node(s) | ||||||
| DISTANT METASTASIS (M) | |||||||
| MX | Presence of distant metastasis cannot be assessed | ||||||
| M0 | No distant metastasis | ||||||
| M1 | Distant metastasis (includes metastasis to ipsilateral supraclavicular lymph node(s) | ||||||
| CLIN | PATH | STAGE GROUPING | |||
| 0 | Tis | N0 | M0 | ||
| I | T1 | N0 | M0 | ||
| IIA | T0 | N1 | M0 | ||
| T1 | N1* | M0 | |||
| T2 | N0 | M0 | |||
| IIB | T2 | N1 | M0 | ||
| T3 | N0 | M0 | |||
| IIIA | T0 | N2 | M0 | ||
| T1 | N2 | M0 | |||
| T2 | N2 | M0 | |||
| T3 | N1 | M0 | |||
| T3 | N2 | M0 | |||
| IIIB | T4 | Any N | M0 | ||
| Any T | N3 | M0 | |||
| IV | Any T | Any N | M1 | ||
*Note: The prognosis with pN1a is similar to that of patients with pN0.
THE FINAL STAHE GROUPNG (CLINICAL & PATHOLOGICAL) IS THE RESPONSIBILITY OF THE ATTENDING PHYSICIAN.
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