Kaposi sarcoma in a patient treated with upadacitinib for rheumatoid arthritis

• Cynthia Fournier, MD, FRCPC,
• Maxwell Benjamin Sauder, MD, FRCPC, DABD,
• Zaid Saeed Kamil, MD, FRCPC,
• Marcus Otho Butler, MD

Affiliations

Cynthia Fournier, MD, FRCPC

Princess Margaret Cancer Center, Toronto, Ontario, Canada; Division of Dematology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Correspondence to: Cynthia Fournier, MD, FRCPC, Hôtel-Dieu-de-Lévis, 143 rue Wolfe, Lévis, QC, Canada G6V 3Z1.

Maxwell Benjamin Sauder, MD, FRCPC, DABD

Princess Margaret Cancer Center, Toronto, Ontario, Canada; Division of Dematology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada

Zaid Saeed Kamil, MD, FRCPC

Toronto General Hospital, Toronto, Ontario, Canada; Department of Laboratory Medicine & Pathobiology, Anatomic Pathology, University of Toronto, Toronto, Ontario, Canada

Marcus Otho Butler, MD

Princess Margaret Cancer Center, Toronto, Ontario, Canada; Division of Medical Oncology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada