[Gouty arthritis in a total knee prosthesis]

This article describes a 69-year-old man with a bilateral total knee prosthesis in whom both knees were swollen and painful. Fever was present and the levels of inflammation markers were markedly elevated. Gout was diagnosed in the right knee and haemarthros during calcium carbasalate use in the left knee. Gout in a knee with a total knee prosthesis is rare and can mimic septic arthritis. Early diagnosis is of particular importance as the therapy of the two conditions differs considerably. Gout is treated with medication while surgical treatment is necessary in a case of septic arthritis, which may even involve removal of the prosthesis.