Fig. 3

a Axial and sagittal T2-weighted magnetic resonance images show an increased signal mass in the olecranon of the left ulna (red arrow). b Axial and sagittal T2-weighted magnetic resonance images show an increased signal mass in the third metacarpal bone of the left hand (red arrow). c Axial and coronal T2-weighted magnetic resonance images show an increased signal mass in the third metatarsal bone of the left foot (red arrow)