Abstract
Merkel cell carcinoma (MCC) is a rare, aggressive malignant neoplasm. Traditionally, wide local excision has been used for local control. However, the tissue-sparing capability of Mohs micrographic surgery (MMS) and the greater certainty of complete tumor removal offer a potential advantage over wide local excision if MMS offers acceptable cure rates. This study aims to help elucidate management of MCC and includes one of the largest groups of patients from a single institution. This study is a retrospective chart review of 22 patients with cutaneous MCC treated with MMS at our practice over 20 years. Clinical characteristics and outcomes were examined. The study protocol conformed to the ethical guidelines of the 1975 Declaration of Helsinki as reflected in the approval by our institution's human research review committee. The overall local recurrence rate was 5% (1/22). The overall rate of biopsy-proven metastasis to regional lymph nodes was 14% (3/22). No cases of distant metastases were documented. To our knowledge, this is the largest group of patients with MCC treated with MMS from a single institution and indicates that MMS may be a useful treatment modality for this rare aggressive disease.
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