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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Margin of normal tissue margin taken in excision of melanoma
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The correct answer is  For in situ melanoma a wide excision of 5 mm is sufficient; for melanoma <1 mm deep, a 1 cm margin is sufficient; and for deeper lesions, a 2 cm only margin is recommended, as there is no evidence that wider margins make a difference.Ref: Bailey and Love, 27e, page: 611