INTRODUCTION: Reconstruction after wide resection for a @entity242 involving the knee extensor mechanism is challenging even if the @entity5 is small. CASE DESCRIPTION: We report on four consecutive @entity924 treated similarly at a single institution. Histological diagnoses were @entity1352 (two cases), clear cell @entity242 and extraskeletal @entity2828 (one case each). Follow-up periods after surgery were 18-67  months. All cases underwent pre-operative radiotherapy and subsequent surgery. After preoperative radiotherapy and wide resection including the @entity79 tendon-bone allograft was fixed to the residual patella and tibial tuberosity with screws and a cable wire. Soft tissue and @entity272 over allograft was covered by free antero-lateral thigh flap. Post-operatively, the operated knee was splinted straight for at least 6 weeks, and then range-of-motion exercise was gradually introduced. Except for one case with a proximal tibial stress fracture 5  months post-operatively, no complication was observed. Both bone-bone junctions between allograft and residual bones were united within 1  year after surgery. At the latest clinical follow-up, all the @entity1 had satisfactory functions with @entity85 Society score of 28-30 out of 30 points and virtually full range of motion. DISCUSSION AND EVALUATION: This case series is the first to report bone-patellar tendon-bone allograft for reconstruction after @entity5 resection with joint preservation and with satisfactory clinical outcomes. CONCLUSIONS: Bone-patellar tendon-bone allograft reconstruction with vascularized flap reconstruction is a viable option for @entity924 .

Bone-patellar tendon-bone allograft reconstruction for XXXX : case series.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity2828 :: ('MESH:D012512', 'Disease') :: ["Ewing's sarcoma"] @entity242 :: ('MESH:D012509', 'Disease') :: ['sarcoma'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity924 :: ('MESH:D052256', 'Disease') :: ['peri-patellar tendon sarcomas', 'peri-patella tendon sarcomas'] @entity1352 :: ('MESH:D013584', 'Disease') :: ['synovial sarcoma'] @entity79 :: ('MESH:D001847', 'Disease') :: ['patellar tendon, bone-patellar'] @entity272 :: ('MESH:D012871', 'Disease') :: ['skin defect'] @entity85 :: ('MESH:D009140', 'Disease') :: ['Musculoskeletal Tumor']
@entity924 :: (MESH:D052256,Disease) :: ['peri-patellar tendon sarcomas']
