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Summary
For basal cell carcinoma (BCC) surgical excision, a minimum 4 mm margin is needed for smaller tumors (<2 cm) to ensure complete eradication of subclinical invasion. This helps achieve clear surgical margins and prevent recurrence.
Area of Science:
- Dermatology
- Surgical Oncology
- Pathology
Background:
- Basal cell carcinoma (BCC) often exhibits subclinical extension beyond visible tumor borders.
- Complete eradication of both clinical and microscopic tumor components is essential for effective surgical therapy.
- Optimal surgical margin width for BCC excision remains a subject of debate.
Purpose of the Study:
- To determine the optimal surgical margin width for complete eradication of previously untreated, well-demarcated basal cell carcinomas.
- To quantify subclinical tumor invasion in relation to visible tumor borders.
Main Methods:
- Study involved 117 cases of previously untreated, well-demarcated basal cell carcinoma.
- Clinically normal skin surrounding tumors was marked in 2-mm increments prior to excision.
- Tumors were excised using Mohs micrographic surgery, and subclinical invasion extent was calculated.
Main Results:
- Subclinical tumor invasion beyond visible borders was quantified using presurgical skin markings.
- For basal cell carcinomas with a diameter less than 2 cm, a minimum margin of 4 mm was required.
- A 4 mm margin achieved complete tumor eradication in over 95% of cases for smaller BCCs.
Conclusions:
- A minimum surgical margin of 4 mm is recommended for the complete eradication of smaller (<2 cm) well-demarcated basal cell carcinomas.
- This margin width is crucial for removing subclinical extensions and achieving negative surgical margins.
- Establishing standardized margin guidelines can improve surgical outcomes for BCC.