case_images: PMC5870059_01
case_images: AP pelvis radiographs show right metal-on-polyethylene THA and left metal-on-metal THA. Components appear in appropriate positions without obvious signs of loosening. AP, anterior-posterior; THA, total hip arthroplasty.
case_images: fig-1.jpg
case_images: PMC5870059_01_fig-1.jpg
case_images: f1
case_images: THA with some eccentric wear of her polyethylene. The left hip radiographs showed an MoM arthroplasty with a well-fixed stem and the acetabular component in the appropriate position, without signs of loosening (Fig. 1).
case_images: Axial cut from CT scan showing large fluid collection (arrow) measuring 5.5 x 6.0 x 10.4 cm that is originating from THA and displacing external iliac vasculature. CT, computed tomography.
case_images: fig-2.jpg
case_images: PMC5870059_01_fig-2.jpg
case_images: f2
case_images: The noncontrast CT showed a large, simple fluid collection that extended into the pelvis and measured 5.5 x 6.0 x 10.4 cm (Fig. 2).
case_images: Venogram of external iliac vein performed intraoperatively by vascular surgery team showed ~70% compression in area of pseudotumor (arrow).
case_images: fig-3.jpg
case_images: PMC5870059_01_fig-3.jpg
case_images: f3
case_images: Vascular surgery deemed that no further intervention would be required at that time (Fig. 3).
case_images: Revision left THA to metal-on-polyethylene construct.
case_images: fig-4.jpg
case_images: PMC5870059_01_fig-4.jpg
case_images: f4
case_images: The femoral component was well fixed, and thus, the original stem was retained and fitted with a metal femoral head (Fig. 4).