[Overlooked spin-out phenomenon as the course of pain in a patient with a mobile-bearing total knee arthroplasty].

We present a case of a 66-year-old woman who had a total knee arthroplasty. Shortly after surgery a 90° rotation of her polyethylene liner took place. The complication was undiagnosed for 1.5 years. To know this problem and be able to diagnose it is crucial for doctors, who come in contact with patients who have had a total knee arthroplasty.