The purpose of this study is to examine whether an magnetic resonance imaging (MRI) -guided treatment strategy based on a predefined treatment algorithm can prevent progression of erosive joint damage, increase remission rate and improve functional level in the short and long term in patients with rheumatoid arthritis (RA).

Rheumatoid arthritis (RA) is a chronic inflammatory joint disease. Patients typically experience pain, functional impairment and reduced quality of life, and are at risk of developing progressive joint damage. The disease primarily affects the small joints of the hands and feet. The current treatment strategy involves early and intensive treatment with close clinical follow up, which attempts to control the disease and avoid inflammation and thereby prevent pain, improve functional level and avoid joint damage. It is therefore important for optimal treatment of RA patients that methods used for diagnosis, disease monitoring and prognostication are highly sensitive. Erosive joint damage occurs early in the disease. Joint deformity is irreversible and causes serious functional impairment. Early and intensive treatment with close monitoring of the inflammation can slow the destructive disease and prevent function loss. However, it has been demonstrated that patients who are shown by conventional clinical and biochemical examination to have low disease activity or to be in remission can still have progressive joint damage. This demonstrates that current clinical/biochemical methods used in daily clinical practice are not sufficiently sensitive and other methods are required for the monitoring of disease activity and prognostication.

The presence of erosions (shown by X-ray examination) as well as anti-cyclic citrullinated peptide (anti-CCP) antibodies and bone marrow oedema (osteitis) on magnetic resonance imaging (MRI), are all independent predictors of subsequent radiographic progression. Bone marrow oedema has been shown to be the strongest independent predictor in early RA and MRI therefore has significant prognostic value.

It is therefore possible that supplementing conventional clinical and biochemical examinations of RA patients with MRI, and intensifying treatment where bone marrow oedema is present, will help reduce disease activity, avoid progressive joint damage and prevent function loss.

The current study is therefore based on the following hypothesis:

By supplementing conventional clinical and biochemical examination of RA patients with low disease activity/in remission with MRI and intensifying treatment in the case of sub-clinical inflammation as measured by the presence of bone marrow oedema, it is possible to prevent radiographic erosive progression, improve functional level and enable more patients to achieve clinical remission.

Inclusion Criteria:

• Age > 18 years

• RA according to ACR (American College of Rheumatology)/EULAR (European League Against Rheumatism) 2010 criteria.

• Anti-CCP positivity

• Erosions on conventional X-ray of hands, wrists and/or feet

• No clinically swollen joints

• DAS28 (4 variable, CRP) < 3.2

• DMARD monotherapy treatment OR combination treatment, in the form of 2- or 3-drug therapy. If the patient is undergoing 3-drug therapy, at least one of the preparations must be administered at less than the "maximum inclusion dose"*

• Unchanged anti-rheumatic treatment in the previous 6 weeks or more

• No previous treatment with biological medication

• No contra-indications for TNF-alpha-inhibiting treatment

• No contra-indications for MRI

• s-creatinine within normal range

• Ability and willingness to give written and oral informed consent and fulfil the requirements of the study programme with reference to the protocol

  • Maximum "inclusion dose" is defined as: MTX 25 mg/week (or maximum tolerated dose if 25 mg/week is not tolerated), SSZ 2g/day (or maximum tolerated dose if 2 g/day is not tolerated) and HCQ 200 mg/day (or maximum tolerated dose if 200 mg/day is not tolerated)

Exclusion Criteria:

• Previous or current biological treatment
• Known intolerance to methotrexate treatment which means that the patient is not able to tolerate a minimum of MTX 7.5 mg (minimum dose).
• DMARD 3-drug therapy at maximum tolerated/maximum "inclusion dose"*
• I.m, intra-articular or i.v glucocorticoid administration ≤ 6 weeks prior to inclusion
• Oral glucocorticoid administration > 5 mg/day
• Changes in oral glucocorticoid dose < 3 months prior to inclusion
• Myocrisin treatment
• Affected liver enzymes > 2 x the upper limit of normal at the time of screening
• Current and/or imminent wish to become pregnant
• Contra-indications for TNF-alpha-inhibiting treatment
• Contra-indications for MRI
• Known alcohol/drug abuse
• Inability to give informed consent
• Inability to cooperate with the study programme due to physical or mental reasons