[Stepwise improvement of visual field after preoperative embolization and tumor resection of cerebral metastasis of alveolar soft part sarcoma].

We report a patient with a brain metastasis from an alveolar soft part sarcoma (ASPS) of the thigh whose visual field defect was resolved in a stepwise manner after preoperative embolization and tumor resection. A 29-year-old man who had undergone surgery to remove an ASPS situated in the thigh developed headaches and homonymous hemianopsia. His visual field defect was evaluated using a Goldmann perimeter.