Intermetatarsal Bursitis in Patients With Rheumatoid Arthritis

The aim of the study is to investigate the incidence and clinical implications of intermetatarsal bursitis (IMB) in patients with rheumatoid arthritis (RA).The hypothesis is that IMB is a cause of pain in patients with RA.

Inclusion Criteria:Age > 18 yearsForefoot pain and diagnosed with RA (patient group)Diagnosed with an axial arthritis (control group)Exclusion Criteria:Age <18 yearsOpen wounds or ongoing infection in the forefoot at the time of examinationPersons with a history of significant trauma in the forefoot, e.g. any fracture or previous surgeries in the forefootPersons who have previously received intermetatarsal treatment (Morton's neuroma or IMB) in the same foot, e.g. injection within 6 months or operation at any timeExclusion from MRI scan only:Persons with contraindications to participate in MRI scanPersons with severely impaired renal function (GFR <30 ml/min)