A critique of the sentinel node concept

Area of Science:

• Oncology
• Surgical Oncology
• Breast Cancer Management

Background:

• The traditional concept of a single "sentinel node" in breast cancer staging is challenged.
• Axillary lymphatic drainage typically involves a group of Level 1 nodes, not a single sentinel node.
• Established axillary sampling techniques have a long history of validity in staging.

Purpose of the Study:

• To critically evaluate the current standard of care for axillary staging in breast cancer.
• To propose alternative terminology and approaches to axillary staging.
• To emphasize personalized treatment strategies based on patient and tumor characteristics.

Main Methods:

• Review of established oncological principles regarding lymphatic drainage.
• Analysis of the historical and current evidence for axillary staging procedures.
• Comparative assessment of sentinel node biopsy (SNB) versus other axillary management options.

Main Results:

• The "sentinel node" concept is deemed inaccurate; lymphatic drainage is to a group of nodes.
• Sentinel node biopsy (SNB) may not be universally applicable as the standard of care.
• Axillary sampling, SNB, axillary dissection, and watchful waiting are all viable options.

Conclusions:

• The term "sentinel node biopsy" should potentially be replaced with "guided axillary sampling" (GAS).
• Treatment decisions for axillary staging must be individualized, considering patient preferences, clinical condition, and tumor specifics.
• A "one-size-fits-all" approach to axillary staging in breast cancer is inappropriate.