To report the postoperative complications and limb function of patients with osteolysis after surgery for bone tumors of the extremities who received anti-osteoporosis therapy in Henan Cancer Hospital in the next 10 years.

A total of 100 patients with osteolysis after surgery for bone tumors of the four extremities who received anti-osteoporosis treatment in Henan Cancer Hospital in the next 10 years were reported. The basic information, treatment methods, postoperative complications and limb function of these patients were collected.

Inclusion Criteria:

1. No age restriction, male or female.
2. A subtype of bone tumor (including benign, malignant, and metastatic cancer) was confirmed in the pathology department of the research institution.
3. Received excision of bone tumor in research institution.

Exclusion Criteria:

Not applicable.

Patients receiving antiosteoporosis therapy for osteolysis after surgery for bone tumors in the extremities