Disclosed is a method for treating of Cockayne Syndrome (CS). Specifically, the invention pertains to a method for the extracorporeal treatment of a body fluid by removing the body fluid from a living body diseased with CS, and applying a targeted antibody conjugated to a moiety to at least one Cockayne Syndrome antigen in the body fluid, creating an antibody-antigen moiety complex, removing antibody-antigen moiety complex from the body fluid, and returning the purified body fluid to the body.
