The New England journal of medicine
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Randomized Controlled Trial Multicenter Study Comparative Study Clinical Trial
Excision margins in high-risk malignant melanoma.
Controversy exists concerning the necessary margin of excision for cutaneous melanoma 2 mm or greater in thickness. ⋯ A 1-cm margin of excision for melanoma with a poor prognosis (as defined by a tumor thickness of at least 2 mm) is associated with a significantly greater risk of regional recurrence than is a 3-cm margin, but with a similar overall survival rate.