TNF Blockers and Cancer: FDA Requires Increased Surveillance Medscape Even in the absence of immunosuppressive drugs, a higher incidence of lymphomas has been found in patients being treated for RA, Crohn's disease, ankylosing spondylitis, psoriatic arthritis, and plaque psoriasis. FDA Warning: Rare Cancer Linked to TNF Blockers Used for Arthritis Update for Tumor Necrosis Factor (TNF) Blockers |