Successful treatment with intraarticular infliximab for resistant knee monarthritis in a patient with spondylarthropathy: a role for scintigraphy with 99mTc-infliximab.

Positive experiences with intraarticular infliximab have been reported in patients with rheumatoid arthritis, ankylosing spondylitis, and Behcet's disease. We used intraarticular infliximab to treat resistant knee monarthritis in a patient with spondylarthropathy. Clinical and laboratory improvement was associated with improvement in scintigraphic findings. This approach is less expensive than intravenous administration of infliximab. We suggest that selection of candidates for this innovative therapy should be guided by anti-tumor necrosis factor alpha scintigraphy.