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Survival of sentinel node biopsy versus observation in intermediate-thickness melanoma: A Dutch population-based
R M H Roumen1,2, M S Schuurman3, M J Aarts3
1Department of Surgery, Máxima Medical Center, Eindhoven/Veldhoven, The Netherlands.
Background:
The Multicenter Selective Lymphadenectomy Trial (MSLT-1) comparing survival after a sentinel lymph node biopsy (SLNB) versus nodal observation in melanoma patients did not show a significant benefit favoring SLNB. However, in subgroup analyses melanoma-specific survival among patients with nodal metastases seemed better.
Aim:
To evaluate the association of performing a SLNB with overall survival in intermediate thickness melanoma patients in a Dutch population-based daily clinical setting.
Methods:
Survival, excess mortality adjusted for age, gender, Breslow-thickness, ulceration, histological subtype, location, co-morbidity and socioeconomic status were calculated in a population of 1,989 patients diagnosed with malignant cutaneous melanoma (1.2-3.5 mm) on the trunk or limb between 2000-2016 in ten hospitals in the South East area, The Netherlands.
Results:
A SLNB was performed in 51% of the patients (n = 1008). Ten-year overall survival after SLNB was 75% (95%CI, 71%-78%) compared to 61% (95%CI 57%-64%) following observation. After adjustment for risk factors, a lower risk on death (HR = 0.80, 95%CI 0.66-0.96) was found after SLNB compared to observation only.
Conclusions:
SLNB in patients with intermediate-thickness melanoma on trunk or limb resulted in a 14% absolute and significant 10-year survival difference compared to those without SLNB.
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