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Microstages in malignant melanoma--the basis for an elective lymph node dissection
Journal of Cancer Research and Clinical Oncology
|January 1, 1980
Summary
For high-risk melanomas, elective lymph node dissection significantly reduces subsequent metastases and improves survival rates compared to excision alone. This surgical approach is recommended for early-stage melanoma patients.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Increasing primary tumor invasion depth correlates with higher regional lymph node metastasis incidence.
- High-risk melanomas present a significant challenge due to metastatic potential.
Purpose of the Study:
- To compare the incidence of subsequent metastases and survival rates between elective dissection and excision-only groups for clinical stage I high-risk melanomas.
- To evaluate the efficacy of elective dissection in managing high-risk melanoma.
Main Methods:
- Retrospective comparison of 175 patients with elective dissection versus 33 patients with excision only.
- Analysis of subsequent metastasis frequency and 5-year survival rates (Berkson-Gage).
Main Results:
- Subsequent metastases occurred in 21% of the elective dissection group versus 46% in the excision-only group (p ≤ 0.01).
- The 5-year survival rate was 41% for patients with elective dissection compared to 21% for those with therapeutic dissection.
Conclusions:
- Elective dissection is associated with a lower incidence of metastases and improved survival in high-risk melanoma patients.
- The findings support the recommendation for elective dissection in managing high-risk melanomas.