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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which among the following is a highly sensitive marker for carcinoma?
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The correct answer is  Essentially all cells of epithelial origin express cytokeratins, which are therefore highly sensitive markers for carcinomas. Ref: Encyclopedia of Cancer, Volume 1 edited by Manfred Schwab, 2008, Page 1496