MARY S.STONEMDSOONBAHRAMIMDCARRIE ANN R.CUSACKMDSENAIT W.DYSONMDMOLLY A.HINSHAWMDVINCENTLIUMD
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A 51-year-old woman presented with a 6-month history of an erythematous patch overlying her right knee (Figure 1). The condition had started 1 month after total replacement of her right knee and was associated with painful, prepatellar bursitis. She had been taking etanercept for her rheumatoid arthritis before the knee replacement butstopped taking it soon afterward. Her medical history was remarkable for seropositive rheumatoid arthritis and Marfan syndrome.
Chiu YE, Maloney JE, Bengana C. Erythematous Patch Overlying a Swollen Knee—Quiz Case. Arch Dermatol. 2010;146(9):1037-1042. doi:10.1001/archdermatol.2010.218-a