MKI67 and Hodgkins lymphoma: The Ki‐67 antigen was originally identified by Gerdes and colleagues in the early 1980s, by the use of mouse monoclonal antibody against a nuclear antigen from a Hodgkin's lymphoma‐derived cell line. This nonhistone protein was named after the researchers' location, Ki for Kiel University, Germany, with the 67 label referring to the clone number on the 96‐well plate [33].