What is TNM staging of breast cancer? The tumor, node, metastasis (TNM) staging system for breast cancer is an internationally accepted system used to determine the disease stage. This disease stage is used to determine prognosis and guide management.
What is the TNM staging based on? In the TNM system, the overall stage is determined after the cancer is assigned a letter or number to describe the tumor (T), node (N), and metastasis (M) categories. T describes the original (primary) tumor. N tells whether the cancer has spread to the nearby lymph nodes.
What is T2 N1 M0 breast cancer? T2, N1, M0: The tumor is larger than 2 cm and less than 5 cm across (T2). It has spread to 1 to 3 axillary lymph nodes and/or tiny amounts of cancer are found in internal mammary lymph nodes on sentinel lymph node biopsy (N1).
What are the 4 stages of breast cancer?
- T1mi: The tumor is the size of 1 mm or smaller.
- T1a: The tumor’s size is between 1 and 5 mm.
- T1b: The tumor size is between 5 and 10 mm.
- T1c: The tumor size is between 10 and 20 mm.