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Merkel Cell Carcinoma Metastatic to Pleural Fluid: A Case Report
Ye-Young Rhee1, Soo Hee Kim1, Eun Kyung Kim2
1Pathology Center, Seegene Medical Foundation, Seoul, Korea.
Abstract:
Merkel cell carcinoma (MCC) is a rare aggressive neuroendocrine carcinoma of the skin that shows locoregional or distant metastasis. Metastasis of MCC to body cavity effusion is extremely rare; only three cases have been reported so far. Metastatic MCC in effusion cytology shows small blue round cells with fine stippled chromatin like other small blue round cell tumors such as small cell lung carcinoma or lymphoma. The diagnosis of metastatic MCC can grant patients good chances at recently advanced therapeutic options. Here, we present a case of metastatic MCC to pleural effusion with characteristic single file-like pattern.
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