case_images: PMC1698139_01
case_images: The radiological appearance of her right hip following
  previous TB, arthrodesis, subsequent lymphoma, and
  radiotherapy:and there is now a radiation induced sarcoma
  involving the right hemiplevis! Note that the left hip is
  normal.
case_images: SRCM2006-28141.001.jpg
case_images: PMC1698139_01_SRCM2006-28141.001.jpg
case_images: F1
case_images: In 1992, the patient, then 52 years old, was diagnosed with a high-grade spindle cell sarcoma involving the right proximal femur and extending into the right acetabulum (Figure 1).
case_images: AP X-ray of the pelvis showing the result 9 years following
  hindquarter amputation, the marked degenerative changes of the
  spine, and the severe osteoarthritis changes of the left hip. It
  is apparent that the whole pelvis is tilted to the left.
case_images: SRCM2006-28141.002.jpg
case_images: PMC1698139_01_SRCM2006-28141.002.jpg
case_images: F2
case_images: Nonoperative therapies had been exhausted and in 2001, when she was aged 62, a decision to perform a total hip arthroplasty was made (Figure 2).
case_images: Three months following the left total hip arthroplasty.
  There appears to be a stress fracture through the floor of the
  acetabulum.
case_images: SRCM2006-28141.003.jpg
case_images: PMC1698139_01_SRCM2006-28141.003.jpg
case_images: F3
case_images: Radiographs revealed a fracture through the floor of the acetabulum (Figure 3).
case_images: The radiological appearance of her pelvis 4 years after the
  total hip replacement. There has been some migration of the
  cemented cup but the hip causes her no pain.
case_images: SRCM2006-28141.004.jpg
case_images: PMC1698139_01_SRCM2006-28141.004.jpg
case_images: F4
case_images: She tended to have an adducted leg but there were no radiological or clinical features suggestive of subluxation (Figure 4).