Osteoporosis is a common clinical problem, especially in patients with rheumatoid arthritis (RA). A reduction in bone mineral density (BMD) of the axial and appendicular skeleton ranging from 7% to 15% has been reported in RA in studies employing a variety of densitometric techniques. Reports consistent with a beneficial effect of tumour necrosis factor blockade on BMD have begun to emerge in recent years, and in Arthritis Research and Therapy, a case control study reports that patients treated with infliximab for RA had preservation of BMD in the lumbar spine and femoral neck compared to those treated with methotrexate.