Management Recommendations for Merkel Cell Carcinoma-A Danish Perspective.

Area of Science:

• Oncology
• Dermatology
• Immunotherapy

Background:

• Merkel cell carcinoma (MCC) is a rare, aggressive skin cancer with increasing incidence and poor prognosis.
• Limited evidence-based guidelines and clinician awareness contribute to challenges in MCC management.
• Consensus recommendations are needed to standardize treatment approaches for MCC patients.

Purpose of the Study:

• To develop consensus-based management recommendations for Merkel cell carcinoma.
• To provide clinicians with updated guidelines for treating localized, regional, and metastatic MCC.
• To improve patient outcomes through standardized and evidence-informed treatment strategies.

Main Methods:

• Systematic literature search to identify relevant studies on MCC management.
• Development of consensus recommendations by a Danish MCC expert group.
• Review of treatment modalities including surgery, radiotherapy, chemotherapy, and immunotherapy.

Main Results:

• Localized MCC: Surgical excision and adjuvant radiotherapy recommended; radiotherapy may be omitted in low-risk cases.
• Regional MCC: Complete lymph node removal and adjuvant radiotherapy for extracapsular disease.
• Metastatic MCC: Immune checkpoint inhibitors (PD-1/PD-L1 axis) recommended as first-line treatment over chemotherapy.
• Follow-up: 5-year surveillance including clinical exams and PET-CT scans.

Conclusions:

• The consensus recommendations provide a framework for uniform MCC patient treatment.
• Adoption of these guidelines, particularly the use of immunotherapy for metastatic disease, is expected to improve prognosis.
• Standardized follow-up protocols are crucial for early detection of recurrence.