PMC5870059_01
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.
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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).
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.
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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).
Venogram of external iliac vein performed intraoperatively by vascular surgery team showed ~70% compression in area of pseudotumor (arrow).
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Vascular surgery deemed that no further intervention would be required at that time (Fig. 3).
Revision left THA to metal-on-polyethylene construct.
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The femoral component was well fixed, and thus, the original stem was retained and fitted with a metal femoral head (Fig. 4).