IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-7-30947 Original Research Paper Role of CEA Marker in diagnosis of Squamous Cell Carcinoma in oral cavity Sumit Kumar Tiwari Dr. Dr. Pawan Singhal Dr. Dr. Maheep Sinha Dr. July 2020 9 7 01 02