Ultrasound: OSTEOCHONDRAL TISSUES: Caption A obtained at the posterior aspect of the distal humeral meta-epiphysis (L1 POST, SAG, LAT level) shows loss of half or more of the total volume of joint cartilage in at least one bone, the humerus (short arrow), along with hemosiderin deposition at the joint space (arrowheads).
MRI: OSTEOCHONDRAL TISSUES: The arrow within the posterior white line box demonstrates cartilage loss and the arrowhead within this box demonstrates joint space hemosiderin deposition on the corresponding MR image (C).
Ultrasound: SOFT TISSUES: Caption B obtained at the anterior aspect of the joint space (L2 SAG, ANT, LAT level) demonstrates large synovial hypertrophy (lighter gray) and hemosiderin deposition (darker gray) [arrowheads] along the anterior aspect of the distal humeral meta-epiphysis, joint space and anterior aspect of the proximal radial meta-epiphysis. The gross osteochondral irregularities (arrows) represent the growth plates of the distal humerus and proximal radius.
MRI: SOFT TISSUES: The arrows within the anterior white line box demonstrate the growth plates of the distal humerus and proximal radius. The arrowheads within this box represent hemosiderin deposition overlying and obscuring the adjacent synovial hypertrophy on the corresponding MR image (C).
Abbreviations: L1, SAG, POST, LAT, L1 sagittal posterior lateral level; L2, SAG, ANT, LAT, L2 sagittal anterior lateral level.
Figure 7: Gray-scale ultrasound images (A, B) of the left elbow of the 11-year old hemophilic boy of Fig. are compared with the corresponding gradient-echo [Multi- Echo Data Image Combination, MEDIC] MR image (C). The boxes with white lining on the MR image (A) show the regions-of-interest of the ultrasound images.