TriangleHEALTH PROFESSIONAL · SOURCE READING
Excision
Source: Melanoma Treatment (PDQ®)–Health Professional Version, National Cancer Institute.
Source updated: May 2, 2025 · Captured 2026-09-09.
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Context: Treatment of Stage 0 Melanoma / Treatment Options for Stage 0 Melanoma
There is no high-level evidence to guide the recommended excision margins for stage 0 (or in situ) melanoma. Consensus guidelines recommend margins of at least 5 mm for stage 0 melanoma, with a goal of achieving microscopically negative margins. However, 5 mm margins may be inadequate for some cases of in situ melanoma, and wider margins may be required.[1,2]
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Preserved source evidence · Not medical advice