CD4 and Fabry disease: FFPE duodenal biopsies from an FD patient with high effector Th2, Th17 populations and a control representative of our flow cytometry findings were stained and visualised for lymphocyte populations using CD3e, CD4, CD8, CD20, CD45RO and CD44, as well as CD68, PanCK, CD11c, CD107a and CD14.