The special use-results surveillance is conducted in patients who have never been treated with Enbrel and in whom its long-term therapy may be instituted in the actual setting of use after marketing with the following objectives: 1. To examine the safety of long-term use of Enbrel including the occurrence of malignant tumors. 2. To confirm the efficacy of Enbrel in the long-term use.

Read more: http://www.clinicaltrials.gov/ct2/show/NCT00503139?cond=%22Arthritis%22&lup_s=07/28/2011&lup_d=30