biostudies-literatureUnknown14Chiang BJDislocation of the polyethylene insert is a rare complication of total knee arthroplasty (TKA), which has only been described in a handful of case reports. Here, we describe a report of a 55-year-old woman presenting 13 months after the primary TKA with signs of neurovascular compromise. A magnetic resonance image showed posterior extrusion of her polyethylene insert causing a mass effect on the gastrocnemius muscle and the popliteal neurovascular bundle. A multidisciplinary team including a joint reconstruction surgeon, vascular surgeon, and nerve specialist performed a revision TKA with peroneal nerve decompression. The polyethylene insert was noted to be dislocated, rotated 90 degrees, and incarcerated in the posterior knee.Arthroplasty today40-43https://www.ebi.ac.uk/biostudies/studies/S-EPMC8850992biostudies-literatureTotal Knee Arthroplasty Complicated by Posterior Dislocation of a Polyethylene Insert and Neurovascular Compromise.PMC8850992Golladay GJJorgensen AAChiang BJRoss JAfalseTotal Knee Arthroplasty Complicated by Posterior Dislocation of a Polyethylene Insert and Neurovascular Compromise.Dislocation of the polyethylene insert is a rare complication of total knee arthroplasty (TKA), which has only been described in a handful of case reports. Here, we describe a report of a 55-year-old woman presenting 13 months after the primary TKA with signs of neurovascular compromise. A magnetic resonance image showed posterior extrusion of her polyethylene insert causing a mass effect on the gastrocnemius muscle and the popliteal neurovascular bundle. A multidisciplinary team including a joint reconstruction surgeon, vascular surgeon, and nerve specialist performed a revision TKA with peroneal nerve decompression. The polyethylene insert was noted to be dislocated, rotated 90 degrees, and incarcerated in the posterior knee.2022-01-01T00:00:00Z2022 Apr2025-04-18T16:35:36.838Z2025-04-07T03:54:03.535ZS-EPMC88509923519870010.1016/j.artd.2022.01.001