Morphologic, dynamic and high-resolution microscopy MRI in early-onset spondyloarthritis finger dactylitis.

Our MRI study on early-onset dactylitis demonstrates that flexor tenosynovitis, joint synovitis and oedema of the digit soft tissue are the predominant alterations visible in the early phase of evolution of dactylitis and that, therefore, enthesitis may not be considered the primary lesion of dactylitis.