Pancytokeratin test is performed on a sample of biopsy tissue to measure the level of Pancytokeratin (Panck) in the biopsy tissue. It is performed to confirm Epithelial Origin Tumours and also during the treatment and after the treatment of Epithelial Origin Tumours. This test is also known as IHC Marker Pan Ck Immunohistochemistry Biopsy Tissue test. Immunohistochemistry (IHC) is a special staining procedure used on fresh or frozen breast cancer tissue extracted during biopsy. This is a very critical process for treatment planning.