Which among the following is a highly sensitive marker for carcinoma?: (A) Cytokeratin, (B) Vimentin, (C) CD45, (D) Calretinin
Answer is A. 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