MRI images often show a ring-enhancing lesion surrounded by edema, a picture indistinguishable from glioblastoma, abscess, and other tumors (including metastasis).

• MRI图像显示一环形水肿性病损，常难以与恶性胶质瘤、溃疡以及其它肿瘤（包括转移灶）相鉴别。