This study evaluated the relationship between excision margin size and local recurrence risk in T1a melanoma located near critical anatomic structures. The findings supported that narrower margins may be acceptable for thin melanomas in cosmetically or functionally sensitive areas without significantly increasing recurrence risk.

Narrower excision margins for T1a melanoma near critical structures do not appear to significantly increase local recurrence rates.

Margin decisions for thin melanomas at sensitive anatomic sites should balance oncologic safety with functional and cosmetic preservation.