Keywords Sacrum;Neoplasms;Digital subtraction angiography;Arterial angiography;Anorectal function;Bladder function;Sacral nerve;Sacral tumor;

• 骶骨;骨肿瘤;数字减影;动脉造影;肛门直肠功能;膀胱功能;骶神经;骶骨肿瘤;