Which of the following is a squamous cell carcinoma marker?: (A) Vimentin, (B) Dermin, (C) Cytokeratin, (D) Glial fibrillary acid protein
Answer is C. The presence of cytokeratins detected by immunohistochemistry, points to an epithelial origin (Carcinoma) where as dermin is specific for neoplasm of muscle cell origin.