ABSTRACT
Twenty-four clinically successful, autopsy retrieved porous-coated anatomic total knee arthroplasty (TKA) specimens were evaluated to determine the structure and function of the patellar meniscus. Mean implant duration was 76 months (range: 11-135 months). Histological examination showed the patellar meniscus to be composed of dense fibrous tissue with scattered regions of chronic granulomatous response to polyethylene debris. Patellar wear and polyethylene exposed patellar surface area were correlated with implant duration (r = 0.47, P = .03; r = 0.52, P = .06). Postoperative patellar tilt was also associated with patellar component wear (r = 0.64, P = .03). No other clinical measures were significantly associated with patellar wear or exposed surface area. Additional research is needed to determine what role, if any, the patellar meniscus plays in TKA outcomes.
Subject(s)
Arthroplasty, Replacement, Knee , Knee Prosthesis , Patella/pathology , Synovial Membrane/pathology , Adult , Aged , Aged, 80 and over , Coated Materials, Biocompatible , Female , Fibrosis , Granuloma/pathology , Humans , Male , Materials Testing , Microscopy , Middle Aged , PolyethyleneABSTRACT
Suprascapular nerve entrapment is a frequently misdiagnosed phenomenon. In this case report, we describe a benign lipomatous tumor causing suprascapular nerve entrapment in the spinoglenoid notch, and we describe the history, clinical examination, and radiographic evaluation. Benign lipomatous tumor compressing the suprascapular nerve is mentioned in the literature, but we believe this is the first case report.
