<prompt> Squamous cell carcinoma marker is -VimentinCytokeratinDesminMyogenin  <response>: Ans. is b i.e., Cytokeratin Ref: Sternberg Diggnostic surgical pathology 4the Volume 1, p. 148-150o Cytokeratin is a intermediate filament found is carcinoma.lmiminohistochemistryo Immunohistochemistry is a method of analyzing and identifying cell types based on binding of antibodies to specific components of the cell.o Antibody, which is specific for an antigen of a particular tissue, is labled with a probe coloured marker and is run on the tissue specimen obtained from a biopsy.o If the tissue has that particular antigen, then antibody will get attached to the tissue and the labled antibody can be seen under a microscope.o Intermediate filaments of eytoskeleton are the major antigens used in immunohistochemistry.o There are five major types of intermediate filaments -CytokeratinCarcinoma, mesothelioma. Non-seminoma GCTVimentinSarcoma Tumor of mesenchymal, melanoma, seminomas, lymphomaNeurofilamentNeural tumorsGlial fibrillary acid proteins GFAPNon-neural brain tissue astroglial origin - Astrocytoma, ependymomas, medul loblastoma, oligodendrogliomaDcsminLeiomyoma smooth muscle Rhabdomyoma skeletal ms. 