Elevated CA19-9 in IgG4-related disease​Derrick HY Chong, Andre Mattman, Aaron Dou, Anthony So, Howard J Lim, Junyan Shi, Richard Cleve, David F Schaeffer, Eric CS Lam, Jennifer J Telford, Luke YC Chen, Mollie N Carruthers1Temerty Faculty of Medicine, 7938University of Toronto, Toronto, ON, Canada2Department of Pathology and Laboratory Medicine, 8156St. Paul’s Hospital, Vancouver, BC, Canada3Artus Health Centre, Vancouver, BC, Canada4Division of Medical Oncology, 8144BC Cancer, Vancouver, BC, Canada5Department of Pathology and Laboratory Medicine, 8167Vancouver General Hospital, Vancouver, BC, Canada6Department of Laboratory Medicine and Pathology, Fraser Health Authority, Surrey, BC, Canada7Division of Gastroenterology, 8166University of British Columbia, Vancouver, BC, Canada8Division of Hematology, 8166University of British Columbia, Vancouver, BC, Canada9Division of Hematology, Dalhousie University, Halifax, NS, Canada10258853Arthritis Research Canada, Vancouver, BC, Canadaon August 8, 2025 at 6:34 am