Original Investigation

Local Recurrence and Survival in Patients With Melanoma In Situ

JAMA Dermatology 10.1001/jamadermatol.2025.3078

September 03, 2025 at 11:00 AM EDT

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What is the frequency of local recurrence in non-lentigo maligna /non-acral lentiginous melanoma in situ (non-LM/non-ALM MIS)?In this cohort study of 401 patients with 403 non-LM/non-ALM MIS and follow-up extending up to 26 years (median, 5.2 years), no local recurrences, metastasis, or melanoma-specific death were observed among patients with histologically clear margins treated with initial excisional biopsy alone or via wide excision.For non-LM/non-ALM MIS, clear histopathological margins either at excisional biopsy or after wide excision may be sufficient, although further studies comparing this approach with current standard management are needed.

Corresponding Author: Clio Dessinioti, MD, 1st Department of Dermatology-Venereology, National and Kapodistrian University of Athens, Andreas Sygros Hospital, 5, Dragoumi Str, 16 121, Kaisariani, Athens, Greece (cliodes@hotmail.com).

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