Breast cancer with dizziness, assess for brain metastasis. No intracranial mass or mass-effect. No restricted diffusion to suggest acute ischemia. No intracranial hemorrhage. The ventricles are within normal limits in size and configuration. There is a linear focus of abnormal enhancement involving the undersurface of the posterior body of the corpus callosum on the left measuring up to 8x4 mm. Otherwise, there is no abnormal parenchymal or meningeal enhancement. Major flow-voids are preserved.Sella and orbits are grossly within normal limits. Paranasal sinuses and mastoid cells are clear. There is an approximately 1 cm enhancing lesion involving the right frontal calvarium and a smaller one involving the left frontal calvarium which are nonspecific. There may be some T1 hyperintensity associated with the right frontal lesion. No destructive changes in the calvarium.
1. There is no definite evidence of intracranial metastatic disease. 8x4 mm linear enhancing lesion is seen involving the left posterior callosum which is nonspecific and would be atypical for metastases. Possibilities include a benign vascular lesion, subacute ischemia and demyelinating lesion, although metastasis is not exluded. Consider close follow up evaluation. 2. No evidence of acute infarct. No intracranial mass or mass-effect. 3. Nonspecific small enhancing lesions in the right and left frontal calvarium. Consider comparison with priors or correlation with bone scan. 