Learning curves and certification for breast cancer lymphatic mapping

Area of Science:

• Surgical Oncology
• Nuclear Medicine
• Pathology

Background:

• Lymphatic mapping and sentinel lymph node (SLN) biopsy are crucial for accurate cancer staging.
• Evaluating mapping success rates and accuracy (false-negative rates) is critical for technique validation.
• Standardized protocols are needed to ensure proficiency and patient safety.

Purpose of the Study:

• To establish a validated protocol for surgeons learning lymphatic mapping and SLN biopsy.
• To define benchmarks for mapping success (85%) and accuracy (low false-negative rate).
• To guide progression from initial training (Phase I) to advanced application (Phase II).

Main Methods:

• Surgeons perform a minimum of 30 SLN biopsies followed by completion axillary lymph node dissections (Phase I).
• Data on mapping success and false-negative rates are reviewed after 30 cases.
• Progression to Phase II (SLN biopsy with completion dissection only if needed) requires meeting performance benchmarks.

Main Results:

• Recommended success rate of 85% with zero or one false-negative case in the first 10 patients with metastatic disease.
• American Society of Breast Surgeons recommends 30+ documented cases with ≥85% success and ≤5% false-negative rate.
• A national network of training centers is being established for radioguided surgery.

Conclusions:

• Individual surgeons must validate their lymphatic mapping and SLN biopsy skills through rigorous data collection and review.
• Meeting performance benchmarks ensures proficiency before advancing to less extensive procedures.
• A national training network will support the adoption of radioguided surgery across various cancer types.