Clinicopathological features and survival disparities between axial and appendicular skeletal Angiosarcoma: A SEER-based analysis using competing risk models

Axial tumors represent a distinct high-risk subgroup characterized by limited surgical resectability and inferior survival. Anatomical location should be considered a critical stratification factor in clinical management and future trials.Abbreviations: <b>ASB,</b> Primary angiosarcoma of the bone; <b>SEER,</b> Surveillance, Epidemiology, and End Results; <b>OS,</b> Overall Survival; <b>CSS,</b> Cancer-Specific Survival; <b>CSD,</b> Cancer-Specific Death; <b>CIF,</b> Cumulative Incidence Function; <b>SHR,</b> Subdistribution Hazard Ratio; <b>CI,</b> Confidence Interval; <b>HR,</b> Hazard Ratio.