RecruitingProcedureNarrow Excision Versus Wide Excision for the Treatment of Adults With Invasive Cutaneous Melanoma, ICEMAN TrialThis clinical trial compares the effect of a narrow surgical excision (removal) to a wide excision for the treatment of adults with invasive cutaneous melanoma. Currently the standard of care is to take wide margins (boarder of healthy tissue surrounding the melanoma) when removing melanoma. Narrow margin excision removes a smaller amount of healthy tissue when surgically removing the melanoma. Narrow margin excision may be effective in removing the melanoma while also reducing surgical complications and improving quality of life for adults with invasive cutaneous melanoma.