Non-Hodgkin Lymphoma as an Unexpected Diagnosis After Elective Total Knee Arthroplasty

Total knee arthroplasty is routinely performed for osteoarthritis of the knee joint. We report a case of non-Hodgkin lymphoma as an unexpected diagnosis after pathologic examination of unusual-looking femoral condyle bone block harvested during total knee arthroplasty in an asymptomatic patient.