OSTEOLYSISGruen zones 2 and 3, with markedly thinned femoral cortex, placing patient at risk for pathologic fracture
OSTEOLYSISABOUT ACETABULAR COMPONENT GRUEN ZONE II, WITH PATHOLOGIC FRACTURE
Osteolysis and metallosis in a patient with a total knee replacement. A focal area of osteolysis is seen in the posterior medial femur. Particulate debris is present throughout the suprapatellar bursa.
Prosthetic synovitis, low power. Hyperplastic synovial membrane obtained adjacent to prosthesis.
OSTEOLYSIS high power. Methylmethacralate debris (linear webs) surrounded by giant cells.
OSTEOLYSIS high power polarized microscopy. Polyethylene flakes (shiny linear material) surrounded by foreign body giant cell reaction.
OSTEOLYSIS low power. Polyethylene flakes (shiny globular material) surrounded by foreign body giant cell reaction and histiocytes.
Dislocation simulating severe polyethylene wear or. The femoral head is posteriorly dislocated a just slightly projects superior to the cup