What to Do When Re-Resection Does Not Clear Margins in Dermatofibrosarcoma Protuberans
In dermatofibrosarcoma protuberans, achieving clear surgical margins is the principal goal of
operative management. When re-resection is performed but clear margins cannot be obtained —
or further surgery is no longer feasible — a defined next-line protocol applies.
Prior Treatment & Failure Condition
The preceding step — re-resection until margins are clear, or until further
surgery is not possible — did not achieve clear surgical margins.
This unmet objective is the criterion that triggers escalation to the current protocol.
Next Management Approach
When surgical clearance cannot be achieved, radiation therapy is the structured intervention
considered at this stage. The protocol specifies how this approach is calibrated to margin
status and the extent of residual disease — details that go beyond what can be summarised here.
Full clinical criteria, field parameters, and decision specifications available in the complete protocol →
References
- Consider radiation therapy (RT) if margins are deemed narrow by treating physician and further resection would not be feasible upon recurrence.
- 50–60 Gy for indeterminate or positive margins, and up to 66 Gy for positive margins or gross tumor (2-Gy fractions per day).
- Fields to extend widely beyond surgical margins (eg, 3–5 cm) when clinically feasible.
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