Primary intracranial synovial sarcoma with hemorrhage: A case report

Figure 4 Imaging changes after treatment of synovial sarcoma. A: Enhanced T1-weighted imaging (T1WI) after craniotomy indicated tumor removal; B-D: Perfusion-weighted imaging 6 mo after craniotomy (3 mo after radiotherapy). Enhanced T1WI indicated that the lesion was larger than before (B). Analysis of the enlarged part of the lesion (the area marked by 9 in C) suggested that the enlarged lesion is hypoperfusion, and radiation necrosis was considered (C and D).