[Synovial sarcoma in a patient with metal-on-polyethylene total hip replacement. A case report]

We present the case of a synovial sarcoma five years after primary total hip arthroplasty in a male 65 year-old patient who was surgically treated for left hip pain due to coxarthrosis. A 32 mm uncemented prosthesis with metal-on-polyethylene tribology was placed in the patient. The latter developed synovial sarcoma that caused lung metastasis. The association between total hip arthroplasty and malignancy is discussed, as well as its frequency worldwide.