Fig 2. MR images of 2 actual cases. A, Case 1: MR images of a 44-year-old woman with a glioblastoma confirmed on pathologic examination (WHO grade IV). Left image: T2WI shows a heterogeneously hyperintense mass with central necrosis and surrounding signal intensity abnormality likely related to tumor extension and edema. Middle and right images: Precontrast and postcontrast T1WIs show hemorrhagic mass and peripheral enhancement with central necrosis, characteristic of glioblastoma. B, Case 2: MR images of a 62-year-old woman with proved metastatic brain tumor from lung cancer. Left image: T2WI shows a cystic frontoparietal mass with mixed-aged hemorrhage. Middle and right images: Precontrast and postcontrast T1WIs show a thin layer of peripheral enhancement. Surgery disclosed adenocarcinoma.