Treatment of High-Risk or Recurrent Basal Cell Carcinoma When Surgery Did Not Achieve Clear Margins
Clinical Scenario
This protocol addresses basal cell carcinoma of the skin in settings where surgical management has not achieved the primary goal of complete, histologically tumour-free excision. The affected population includes patients with:
- Recurrent basal cell carcinoma
- Aggressive histopathological subtype
- Tumour located on a critical anatomical site
- Poorly defined margins
- Perineural invasion
- Multiple basal cell carcinomas
When the Previous Treatment Step Did Not Succeed
The first-line approach for high-risk BCC (EADO stage II) is micrographically controlled (3D) surgery, or alternatively standard surgical excision with an adequate safety margin where anatomically feasible. The defined goal of that step is complete resection with histologically tumour-free surgical margins. When that goal is not met — whether due to tumour characteristics, anatomical constraints, or disease recurrence — escalation to the next treatment step is indicated.
Next-Step Treatment Approach
For patients who are not candidates for surgery or who decline further surgery, radiotherapy is the treatment modality involved at this stage. The specific fractionation schedules, dose targets, and eligibility criteria are detailed in the full protocol.
Complete regimen details — including dosing, fractionation options, and treatment algorithm — are available via the full structured protocol below.
References
DOI: 10.1016/j.ejca.2023.113254
- Micrographically controlled surgery shall be offered in high-risk and recurrent BCC, and BCC located on critical anatomical sites.
- Micrographically controlled surgery (3D) shall be offered in high-risk BCC (recurrent, aggressive subtypes, location in critical anatomical sites, poorly defined margins).
- Radiotherapy shall be used in patients who are not candidates for surgery or decline surgery.
- Advanced lesions may be treated with megavoltage radiation to doses between 60 and 70 Gy, using 2 Gy fractions, five fractions per week; hypofractionated approaches such as 45 Gy in 10 fractions or 54 Gy in 18 fractions represent equi-effective treatment schedules.
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