From the archives of the Rizzoli institute all the patients (approximately 150 patients) undergoing oncological reconstruction of proximal femur from 01/01/1991 to 31/12/2023.

A review will be made from the medical records, radiological imaging, and histological data of these patients

Inclusion Criteria:

• Male and female patients surgically treated with an oncological reconstruction of the proximal femur at Rizzoli Orthopaedic Institute between 01/01/1991 and 31/12/2023
• Age: 18-90 years old (at the time of primary surgery)
• Diagnosis of bone sarcoma
• Patients with available clinical and imaging data

Exclusion Criteria:

• At least one inclusion criterion not met

Male and female patients surgically treated with an oncological reconstruction of the proximal femur at Rizzoli Orthopaedic Institute between 01/01/1991 and 31/12/2023