Histiocytic reaction to hip arthroplasty.

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Abstract
Pain secondary to loosening of a total hip prosthesis is a common complaint and a major complication after surgery. Periprosthetic lucency is a well-recognized result of loosening of the prosthesis and of infection. Histiocytic proliferation as an additional cause of periprosthetic lucency and lytic change in 2 patients is described. This apparently has not been previously reported in the radiological literature.