Ultrasound: SOFT TISSUES: Gray-scale (A, B) and color Doppler (C) ultrasound images of this elbow demonstrate the large joint effusion (arrow, A, L1 SAG, ANT, LAT level) along with speckles of hemosiderin deposition within the synovium anterior to the distal humeral meta-epiphysis (small arrows, black foci within synovium, A [L1 SAG, ANT, LAT level]) and anterior to the proximal metaphysis of the radius (small arrows, black foci within synovium, F [L3 SAG, ANT, LAT level]). Color Doppler ultrasound reveals moderate synovial hyperemia (C, L3 SAG, ANT, LAT level) anterior to the proximal metaphysis of the radius.
MRI: SOFT TISSUES: Corresponding sagittal turbo spin-echo T1-weighted (D), T2-weighted fast spin-echo (E), Multi-Echo Data Image Combination [MEDIC] (F) and 3D water excitation Double Echo Steady State [DESS](G) MR images of this elbow show a large joint effusion (arrows, D, E), and extensive hemosiderin deposition and synovial hypertrophy (arrows, F, G).
MRI: OSTEOCHONDRAL TISSUES: In addition to the aforementioned soft tissue changes, subchondral cysts are identified within the radial head (arrowhead, E). Articular surface irregularities are seen along the capitellum and radial head suggestive of bone erosions (arrowheads, F).
Please find within the boxes with white lining on MR images the regions-of-interest that were assessed with ultrasound on corresponding images: A (ultrasound) and D (MRI), L1 SAG, ANT, LAT level; B, C (ultrasound) and E, F, G (MRI), L3 SAG, ANT, LAT level.
Abbreviations: L1, SAG, ANT, LAT, L1 sagittal anterior lateral level; L3, SAG, ANT, LAT, L3 sagittal anterior lateral level.
