Giant Solitary Cyst at the Site of Knee Osteoarthritis: Treatment with a Synthetic Resorbable Bone Graft Substitute and Primary Total Knee Arthroplasty

Abstract

A 48-year-old male patient presented in our department with knee osteoarthritis and a giant cystic lesion of the lateral femoral condyle. Bone biopsy of the lesion was performed. Histopathological examination confirmed the presence of a solitary bone cyst. The patient was treated by curettage of the cyst, filling with a synthetic resorbable bone graft substitute (Cerament™), and primary, cruciate-retaining total knee arthroplasty. 4 months after surgery, complete osseointegration of the bone graft substitute was evident on X-rays. The use of modern bone graft substitutes might be a novel alternative to other established techniques in the management of large bone lesions, even at the site of primary total knee replacement.

Management of a Massive Solitary Femoral Condyle Bone Cyst at the Site of Knee Osteoarthritis with a Synthetic Bone Graft and Primary Robotic-assisted Cementless Total Knee Arthroplasty: A Case Report

“…A limited number of cases has been reported in the literature regarding the treatment of bone cysts in an osteoarthritic knee [ 16 , 17 , 18 ]. Moreover, only one case has been described using SBGS and TKA for the treatment of bony cysts.…”

“…Moreover, only one case has been described using SBGS and TKA for the treatment of bony cysts. Thiery et al [ 16 ] described a case of a male patient with a large lateral femoral condyle cyst. He was treated with curettage, filling with a CaS/HA bone graft substitute composed of 40% HA and 60% CaS (Cerament, Bonesupport, Lund, Sweden) and primary CR TKA.…”

“…Furthermore, their utilization offers several advantages, including minimally invasive application, abundance, reliable injectability, rapid osteointegration, and no donor site morbidity [ 15 ]. Therefore, for large bone cysts, SBGS may provide an effective treatment option in filling the void and stimulating osteointegration [ 16 ].…”