Test Details: Immunohistochemical testing helps to identify specific antigens (proteins) within tissue sections utilizing an antigen-specific antibody. The expression of Ki-67 strongly correlates with the intensity of cell proliferation and tumour grade. In routine hematopathology, the Ki-67 index is an important parameter to classify low and high grade lymphomas. Additionally, the Ki-67 index is a well-known prognostic marker correlating with the biological behaviour of tumours such as breast carcinoma and neuroendocrine tumours.