Angiosarcoma in the femoral bone: A case report of a rare bone tumor

Introduction and importance: Angiosarcoma is a high-grade endothelial sarcoma rarely found in the bones. Challenges lie in its rareness, high mortality, metastasis, and recurrence. The role of radiotherapy and chemotherapy in managing angiosarcoma remains debatable, while surgery stands out as the optimal treatment for local control. We present a patient with angiosarcoma of the bone, managed through a combination of surgery and radiotherapy. Case presentation: A 66-year-old male presented with pain on the right distal femur and was unable to weight bearing after lifting a box. The X-ray showed a fracture and lytic lesion. The patient has lost 5 kg of body weight in the last 3 months. The Clinicopathological Conference (CPC) suspects a malignancy process, prompting us for wide resection, biopsy, and ORIF with cement augmentation. Histopathology and immunohistochemistry results confirmed the diagnosis of angiosarcoma. We decide to manage patients with radiotherapy without chemotherapy and regular monthly monitoring. The patient exhibited clinical improvement. Discussion: Angiosarcoma of the bone tends to have a bad prognosis. Diagnosis might be challenging as it is a rare condition and could be easily confused with another disease. The routine CPC we held was beneficial for the diagnosis and treatment of the patient. The combination of surgery and radiotherapy is yielding positive outcomes. Conclusion: Angiosarcoma should be considered in patients with osteolytic lesions in the bone. Surgery and radiotherapy are important to local control in patients with angiosarcoma.