title: Custom-made intercalary endoprosthetic reconstruction for a parosteal osteosarcoma of the femoral diaphysis: A case report.
abstract: The present report describes a case of a 44-year-old female patient who presented with a palpable mass of the left thigh. A diagnosis of parosteal osteosarcoma (POS) at the femoral diaphysis was made following a diagnostic workup. Previous reports of long bone diaphyseal POS are rare. A long diaphyseal segment of the femur containing the tumor was resected along with a healthy margin of soft tissues, and the damaged bone was reconstructed with a custom-made intercalary endoprosthesis. Subsequent pathological examination of the surgical sample confirmed the diagnosis of POS. No local recurrence or distant metastasis was observed, and the patient had a positive Musculoskeletal Tumor Society score of 28/30 (93.3%) at the 28-month post-surgery follow-up. The present study describes the clinical, radiological, and pathological features of this rare type of osteosarcoma.
authors.affiliation: Department of Orthopaedics, Shanghai Sixth People's Hospital, Shanghai Jiaotong University, Shanghai 200233, P.R. China.
authors.forename: Shi-Chang
authors.initials: SC
authors.lastname: Zhao
authors.affiliation: Department of Orthopaedics, Shanghai Sixth People's Hospital, Shanghai Jiaotong University, Shanghai 200233, P.R. China.
authors.forename: Chang-Qing
authors.initials: CQ
authors.lastname: Zhang
authors.affiliation: Department of Orthopaedics, Shanghai Tenth People's Hospital, Tongji University, Shanghai 200072, P.R. China.
authors.forename: Chun-Lin
authors.initials: CL
authors.lastname: Zhang
keywords: custom made intercalary endoprosthesis; femoral diaphysis; parosteal osteosarcoma; wide resection