1. Surgical margins required for basal cell carcinomas treated with Mohs micrographic surgery according to tumor features
- Author
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Betina Werner, Felipe Bochnia Cerci, Stanislav N. Tolkachjov, and Elisa M. Kubo
- Subjects
Adult ,Male ,medicine.medical_specialty ,Skin Neoplasms ,medicine.medical_treatment ,Dermatology ,Micrographic surgery ,Lesion ,030207 dermatology & venereal diseases ,03 medical and health sciences ,0302 clinical medicine ,Patient age ,medicine ,Humans ,Basal cell ,Basal cell carcinoma ,Stage (cooking) ,Aged ,Neoplasm Staging ,Retrospective Studies ,Skin ,Aged, 80 and over ,business.industry ,Wide local excision ,Margins of Excision ,Middle Aged ,Mohs Surgery ,medicine.disease ,Treatment Outcome ,Carcinoma, Basal Cell ,030220 oncology & carcinogenesis ,Practice Guidelines as Topic ,Female ,Radiology ,medicine.symptom ,business ,Clearance - Abstract
Background Basal cell carcinomas (BCCs) with high-risk features are preferably treated by Mohs micrographic surgery. Studies have shown clinicopathologic characteristics that may predict more stages required for clearance. However, few studies have correlated such factors with the number of millimeters removed per stage. Objective To determine margins necessary for BCC clearance according to tumor features, especially for tumors less than 6 mm, and to suggest initial margins for Mohs micrographic surgery and margins for wide local excision. Methods Retrospective analysis of 295 consecutive Mohs micrographic surgeries for primary BCCs. Variables analyzed included patient age, sex, immunostatus, lesion size, location, histologic subtype, borders, stage number, and millimeters excised per stage. Results BCCs less than 6 mm had a clearance rate of 96% with 3-mm margins. In adjusted multivariable analysis, superficial, micronodular, infiltrative, and morpheaform subtypes were associated with larger margins, whereas clinically well-defined tumors were associated with smaller margins. Limitations Because of the limited sample of certain subtypes, a 3-mm margin is better suited for nodular tumors. Conclusion These data help guide initial Mohs micrographic surgery and wide local excision margins required for tumor clearance according to tumor features. Nodular BCCs less than 6 mm may be cleared with 3-mm margins instead of the current 4-mm margin recommendation.
- Published
- 2020