Insufficiency fractures: A rare cause of foot and ankle pain in three patients with rheumatoid arthritis.

Insufficiency fractures are recognized but rare complications in patients with longstanding rheumatoid arthritis. Such fractures are typically solitary and are rarely seen to affect the foot and ankle. We describe 3 women with longstanding rheumatoid arthritis, treated with one, or a combination of, corticosteroids, DMARDs and anti-TNF, presenting with foot and ankle pain with no prior history of trauma. MRIs showed rare multiple florid insufficiency fractures of the foot and ankle, in 2 cases bilaterally, which were managed conservatively. These cases highlight the importance of considering insufficiency fractures in similar patients presenting with foot and ankle pain. Radiographs may fail to demonstrate these lesions, delaying diagnosis, and worsening patient outcome, therefore in such cases MRI is a valuable modality.