The number (percentage) of patients with change > SDC for the standard therapy and TNFα inhibitor groups was five (7.4%) and 15 (19%) patients for fat metaplasia, eight (11.8%) and 15 (19%) patients for Backfill, 12 (17.6%) and 24 (30.4%) patients for erosion, and seven (10.3%) and 11 (13.9%) patients for Ankylosis, respectively. Here, TNF is linked to ankylosis.