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flag A new test may spare many melanoma patients unnecessary biopsies by accurately identifying those at low risk of lymph node spread.

flag A new genomic test, Merlin CP-GEP, may help many melanoma patients avoid unnecessary lymph node biopsies by analyzing eight genes in existing tumor tissue along with age and tumor thickness. flag A large U.S. trial of 1,761 patients found the test accurately identified low-risk individuals, with 93% having no cancer in their lymph nodes. flag About 25% of high-risk patients did have spread, suggesting the test can guide personalized treatment. flag Currently, most biopsies show no cancer, and the procedure carries risks. flag The test, which uses tissue already collected, could reduce overtreatment and improve care, pending further validation.

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