Total Knee Arthroplasty in a Patient with an Ankylosing

by previous patellectomy has not been reported. Here, we report a case of primary TKA using a posterior stabilized prosthesis in a patient with ankylosis associated with previous patellectomy due to a gunshot injury. The patient obtained satisfactory results after surgery with improvement of range of motion (ROM). Case Report A 66-year-old male visited our clinic complaining of right knee pain and restriction in ROM of the right knee, especially in flexion. He had undergone a patellectomy on the right knee for a gunshot injury 45 years ago, and knee pain and limitation of ROM worsened gradually since 10 years ago. He did not respond to conservative treatment, had progressive reduction in the am-bulatory capability and was barely able to climb a single flight of stairs at presentation to our clinic. Clinical examination of the right knee revealed a transverse surgical scar with a varus knee alignment of 3o, 0o to 15o of active ROM, and severe ankylosis. There was no collateral ligament laxity and both the anterior drawer and Lachman tests were negative. There was no posterior sag and no extension lag. Plain radiographs showed severe bi-compartmental osteoarthritis (Fig. 1). TKA was performed through an anterior midline longitudinal skin incision, which was perpendicular to the previous patel-lectomy scar. Arthrotomy was made medial to the scar tissu