Axillary staging during surgery for breast cancer

Area of Science:

• Oncology
• Surgical Pathology

Background:

• Axillary lymph node status is critical for breast cancer prognosis.
• Sentinel lymph node biopsy is not always feasible, necessitating axillary dissection.
• The optimal number of lymph nodes for accurate staging is debated.

Purpose of the Study:

• To investigate the impact of the number of retrieved axillary lymph nodes on breast cancer staging accuracy.
• To determine if retrieving more lymph nodes than the conventional number improves the detection of node positivity.

Main Methods:

• Analysis of data from 31,679 breast cancer operations in Denmark.
• Statistical evaluation of the correlation between the number of retrieved lymph nodes and disease staging.

Main Results:

• The quantity of retrieved axillary lymph nodes strongly and independently predicted node positivity.
• Increased lymph node retrieval led to improved staging across all tumor sizes.
• Retrieving 20+ nodes versus 10-14 nodes significantly increased node positivity detection rates for all tumor sizes.

Conclusions:

• Higher numbers of retrieved lymph nodes correlate with an increased number of detected metastatic lymph nodes.
• These findings emphasize the importance of comprehensive lymph node dissection for accurate breast cancer staging.
• High-quality specialist surgical and pathological services are essential for optimal breast cancer treatment outcomes.