Total knee arthroplasty after former knee fusion in a patient with Ehlers Danlos syndrome.

A 46-year-old female patient with Ehlers-Danlos Syndrome had undergone fusion of her right knee 25 years before presentation. This markedly affected her quality of life. She underwent a two-stage conversion to a constrained rotating-hinge total knee arthroplasty. She regained a satisfiing range of motion and she has a painfree, mobile and stable knee at 42 months follow-up. Conversion of knee fusion to TKA is a demanding procedure that should only be