CD27 and Huntington disease: The same observation was reported by Morbach et al [27], with reference values for memory B cells, in 26 to 50 years old HD, corresponding to 15.2% (13.4–21.4) for CD27+IgD+ unswitched memory and to 13.2% (9.2–18.9) for CD27+IgD- switched memory B cells.