CD38 and immunoglobulin G4-related sclerosing disease: These include LOXL2, which plays a role in fibrogenesis in PSC and IgG4-RD (67), SLAMF7 which is expressed highly on PBs and CTLs in IgG4-RD (59, 60) and CD38 which is expressed on expanded PBs in IgG4-RD (34, 58, 132, 152).