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- W3096441198 abstract "Background. The incidence of melanoma in situ (MIS) is increasing faster compared to invasive melanoma. Despite varying international practice, a minimum of 5 mm surgical excision margin is currently recommended in the UK. There is no clear guidance on the minimum histological peripheral clearance margins. Aim. This study compares the histological peripheral clearance margins of MIS using wide local excision (WLE) to the rate of recurrence and progression to invasive disease. Methods. A retrospective single-center review was performed over a 5-year period. Inclusion criteria consisted of MIS diagnosis, ≥16 years of age, and treatment with WLE with curative intent. Those patients with a recurrence of a previous MIS or with a reported focus of invasion/regression were also included. Clinicopathological data and follow-up were recorded. Results. 167 MIS were identified in 155 patients, 80% of which were lentigo maligna subtype. Of patients with completely excised MIS on histology (>0 mm), 9% had recurrence with a median time to recurrence of 36 months. Three (1.8%) cases recurred as invasive disease. Age, MIS site, MIS subtype, and histological evidence of foci of invasion/regression did not predict recurrence nor progression to invasive disease ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M1> <mi>p</mi> <mo>></mo> <mn>0.05</mn> </math> ). The recurrence rate of MIS with a histological excision margin ≤3.0 mm was 13% compared to 3% in those with histology margins of >3.0 mm ( <math xmlns=http://www.w3.org/1998/Math/MathML id=M2> <mi>p</mi> <mo>=</mo> <mn>0.049</mn> </math> ). Conclusion. A histological peripheral clearance of at least 3.0 mm is advocated to achieve lower recurrence rates. The follow-up duration should be reviewed due to the median recurrence occurring at 36 months in our cohort. Cumulative work on MIS needs to be collated and completed in a large multicenter study with a long follow-up period." @default.
- W3096441198 created "2020-11-09" @default.
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- W3096441198 date "2020-10-29" @default.
- W3096441198 modified "2023-10-18" @default.
- W3096441198 title "Histological Peripheral Margins and Recurrence of Melanoma In Situ Treated with Wide Local Excision" @default.
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- W3096441198 doi "https://doi.org/10.1155/2020/8813050" @default.
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