Malignant neoplasm of bronchus and lung, unspecified site [162.9], Reason for Study: ^Reason: hx of lung CA, eval brain mets History: weakness Variable size in numerous ring-enhancing lesions with the surrounding edema on bilateral hemisphere as well as posterior fossa including brainstem indicating metastatic lesions.On susceptibility imaging, each lesion shows various portion of susceptibility artifacts indicating intralesional hemorrhage or calcification.On sagittal image, there is about 7 mm tonsillar herniation indicating Chiari malformation.The ventricles, sulci and cisterns are symmetric and unremarkable. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear.Left-sided maxillary sinus shows retention cyst.There is no acute ischemic lesion.
Multifocal various sized ring-enhancing lesions with the surrounding edema and possible internal hemorrhage or calcification indicating metastatic lesions as described above.