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False-negative sentinel lymph node biopsy for melanoma: a single-surgeon experience
Julia Downey1, Kimberly DeVries1, Ian Marie Lano1
1From the Department of Surgical Oncology, BC Cancer-Sindi Ahluwalia Hawkins Centre, Kelowna, B.C. (Downey, Baliski); the Cancer Surveillance and Outcomes, BC Cancer, Vancouver, B.C. (DeVries); the Department of Pathology, Kelowna General Hospital, Kelowna, B.C. (Lano); the University of British Columbia Southern Medical Program, Kelowna, B.C. (Baliski).
The sentinel lymph node biopsy (SLNB) false-negative rate for melanoma patients was 10.2% for isolated regional recurrences. This rate is crucial for managing melanoma patients, especially with new adjuvant therapies.
Area of Science:
- Oncology
- Surgical Pathology
- Dermatology
Background:
- Sentinel lymph node biopsy (SLNB) is critical for melanoma staging and prognosis.
- Adjuvant immunotherapy has increased the importance of accurate SLNB in patient management.
- Assessing the false-negative rate of SLNB is essential for refining melanoma treatment strategies.
Purpose of the Study:
- To determine the false-negative rate of sentinel lymph node biopsies (SLNBs) in melanoma patients.
- To evaluate the prognostic significance of SLNB results in the context of modern melanoma treatment.
Main Methods:
- Retrospective review of 501 melanoma patients who underwent SLNB between 2005 and 2020.
- Analysis of patient demographics and pathological data.
- Cross-referencing of SLNB results with subsequent recurrence data.
Main Results:
- 19.4% of patients had positive sentinel lymph nodes; 80.6% had negative results.
- A false-negative rate of 10.2% was calculated for isolated regional recurrences.
- Recurrence rates were comparable across different lymph node basins (axilla, groin, neck).
Conclusions:
- The study identified a 10.2% false-negative rate for SLNB in melanoma, specifically for isolated regional recurrences.
- These findings have implications for treatment decisions, particularly regarding adjuvant systemic therapy.
- Accurate SLNB interpretation is vital for optimizing melanoma patient care and outcomes.
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