Which classification system is primarily used for staging breast tumors?

The TNM staging system is the classification system primarily used for staging breast tumors. This system provides a comprehensive framework to assess and describe the extent of cancer in the body by evaluating three key components: Tumor size and local extent (T), regional lymph node involvement (N), and the presence of distant metastasis (M). This multifaceted approach helps healthcare providers determine the stage of breast cancer, which is crucial for planning the appropriate treatment strategy and predicting patient outcomes.

The reliance on the TNM system in breast cancer staging is widespread due to its detailed and systematic nature, allowing for consistent communication among healthcare providers and facilitating research that can inform treatment protocols. This method is endorsed by organizations such as the American Joint Committee on Cancer (AJCC), which integrates the TNM classification into its Cancer Staging Manual, further solidifying its role in oncological practice.

Other classification systems mentioned in the question serve different purposes; for instance, the FIGO staging system is more commonly used for gynecological cancers, and the Breslow depth system typically applies to melanoma staging. Therefore, the context and specific focus of the TNM system make it the essential standard for staging breast tumors effectively.