Abstract
The treatment of Merkel cell carcinoma (MCC) is based on data from institutional case series. Local disease treatment consists of surgical excision, radiation monotherapy, or postoperative adjuvant radiation. In cases where tumor diameter ≤2 cm, surgical margins of 1 cm are reasonable. For tumors >2 cm, 2 cm margins are recommended. Due to the high rate of sentinel node positivity, sentinel lymph node biopsy with immunohistochemistry should be performed in nearly every case of MCC. In cases where excision prior to identification of the sentinel lymph node (SLN) may compromise identification of the SLN, adjuvant radiation therapy to the primary site, nodal beds, and in-transit lymphatics should be considered. Patients with a positive SLN should undergo completion lymph node dissection or radiation monotherapy to the regional basin. Multidisciplinary tumor boards are helpful in planning treatment for patients with regional or systemic disease. Treatment of regional disease consists of lymphadenectomy with or without adjuvant radiation, radiation monotherapy, or possibly adjuvant chemotherapy. Treatment of distant disease primarily consists of palliative chemotherapy, with the addition of radiation treatment and surgery where indicated.
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Winstanley, D., Soon, S. (2013). Treatment Algorithm. In: Alam, M., Bordeaux, J., Yu, S. (eds) Merkel Cell Carcinoma. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6608-6_11
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