Skin Discoloration Following Total Knee Replacement
A 63-year-old man presented with bluish-livid discoloration of the skin over the knee joint. Fourteen years previously he had undergone primary knee replacement. Clinical examination revealed popliteal and prepatellar bluish-livid discoloration. Elsewhere this cutaneous discoloration had been interpreted as varicosis. Knee joint radiographs showed asymmetry of the joint space as a sign of polyethylene wear. Intraoperatively we found polyethylene wear with ensuing metallosis. Conversion to a rotating hinge knee prosthesis was performed. The patient was discharged 9 days after surgery. Total knee replacement is generally a successful procedure with survival rates of at least 10 to 15 years. Polyethylene wear is a known late complication necessitating revision. However, cutaneous discoloration has not previously been described as the first sign of polyethylene wear with ensuing metallosis.
PD Dr. med. Mustafa Citak, Gelenkchirurgie, HELIOS Endo-Klinik Hamburg, email@example.com
Prof. Dr. med. Thorsten Gehrke, HELIOS Endo-Klinik Hamburg
Dr. med. Alaa Aljawabra, Gelenkchirurgie, HELIOS Endo-Klinik Hamburg
Conflict of interest statement: The authors declare that no conflict of interest exists.
Translated from the original German by David Roseveare.
Cite this as: Citak M, Gehrke T, Aljawabra A: Skin discoloration following total knee replacement. Dtsch Arztebl Int 2019; 116: 343. DOI: 10.3238/arztebl.2019.0343