Calvarial Chondroplastic Osteosarcoma With Distant Brain Metastasis Treated With Radiosurgery: A Rare Case Report. - Azab, Mohammed A.; Hazim, Ahmed; El-Gohary, Nour; Nabih Shama, Mohsen; Kammoun, Brahim; Mathangasinghe, Yasith (Case Reports in Medicine, 2025)