Scholarlink

<p>Merkel cell carcinoma (MCC) is a rare and aggressive neuroendocrine skin tumor, which preferentially appears in the head and neck area. Overall 5-year survival is about 66–70% in patients with non-metastasized tumors and reduces to 42% in cases with regional metastases, and down to 18% in case of distant metastases. The Ki67- index is one of the most important biological markers in neuroendocrine tumors and is recently known as a prognostic marker in pancreatic neuroendocrine neoplasms. This study aims to evaluate the prognostic role of Ki67 in Merkel cell carcinoma. A cut-off value for Ki67 index was calculated using Youden’s index. Overall, 16 patients were included in this retrospective study. The best matching cutoff value for our data was calculated at 77.5%. Ki67 turned out to be &gt; 85% in patients with local recurrence of MCC and &gt; 90% with lymph node metastases. A Ki67-index of 77.5% stratified the patients in our cohort most efficiently. A safety margin higher than 1&#xa0;cm should be aimed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Prognostic value of different immunohistopathological patterns and Ki67 proliferation index for Merkel cell carcinoma

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月23日

查看全文
  • Katharina Theresa Obermeier,
  • Wenko Smolka,
  • Maximilian Kollmuss,
  • Sabina Noreen Wuersching,
  • Ina Dewenter,
  • Philipp Poxleiter,
  • Sven Otto,
  • Yoana Malenova,
  • Florian Fegg,
  • Paris Liokatis

摘要

Merkel cell carcinoma (MCC) is a rare and aggressive neuroendocrine skin tumor, which preferentially appears in the head and neck area. Overall 5-year survival is about 66–70% in patients with non-metastasized tumors and reduces to 42% in cases with regional metastases, and down to 18% in case of distant metastases. The Ki67- index is one of the most important biological markers in neuroendocrine tumors and is recently known as a prognostic marker in pancreatic neuroendocrine neoplasms. This study aims to evaluate the prognostic role of Ki67 in Merkel cell carcinoma. A cut-off value for Ki67 index was calculated using Youden’s index. Overall, 16 patients were included in this retrospective study. The best matching cutoff value for our data was calculated at 77.5%. Ki67 turned out to be > 85% in patients with local recurrence of MCC and > 90% with lymph node metastases. A Ki67-index of 77.5% stratified the patients in our cohort most efficiently. A safety margin higher than 1 cm should be aimed.