The EOS imaging system for understanding a patellofemoral disorder following THR.
An aspect of patellofemoral syndrome secondary to total hip replacement (THR) is mainly suggestive of a problem of femoral implant torsion. We here present the first reported case of patellofemoral syndrome secondary to THR relating to limb-length discrepancy, with no abnormality of femoral torsion. The pelvis adapted to the length inequality by axial rotation rather than frontal tilt, and this went undetected on standard X-ray and CT-scan. 3D imaging in upright posture on the EOS system enabled the situation to be clearly described and analyzed, and adapted surgical correction to be indicated.
Orthopedic and Traumatologic Surgery Department, Pitié-Salpêtrière Hospital, 47, boulevard de l'Hôpital, 75013 Paris, France.
J-Y
JY
Lazennec
A
A
Rangel
A
A
Baudoin
W
W
Skalli
Y
Y
Catonne
M-A
MA
Rousseau
D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D003937:Diagnosis, Differential; D004867:Equipment Design; D005260:Female; D006801:Humans; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D046788:Patellofemoral Pain Syndrome / Q000000981:diagnostic imaging* / Q000209:etiology / Q000601:surgery; D012086:Reoperation; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*