The investigators will collect data of patients treated surgically for impending or pathological fracture of the proximal femur due to bone metastases between 01/01/2000 and 31/12/2023 with IMN or THA or HHA or MegaTHA or Mega. After pre-screening the databases of the respective sites, the investigators expect to find approximately a total of 600 patients. A review will be made from the medical records, radiological imaging, and histological data of partecipants.
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Analysis of implant survival
Timeframe: through study completion, an average of 1 year
Analysis of complications
Timeframe: At baseline ( T0)
Analysis of functional score
Timeframe: 1 year