Presentation
History of breast cancer, presenting with dizziness, headache, ataxia
Patient Data
Subarachnoid FLAIR hyperintensities are present along the cerebral convexity, occipital lobe, and along the cerebellar folia. There is also a perimesencephalic hyperintensity.
After gadolinium injection, there is enhancement of the subarachnoid spaces, perimesencephalic, and cerebellar folia (leptomeningeal enhancement).
Case Discussion
Subarachnoid FLAIR hyperintensities are present in many pathologies, such as subarachnoid hemorrhage, leptomeningeal carcinomatosis, meningitis, and Moya Moya disease among others.
It's necessary to evaluate these hyperintensities with information from the other sequences, in order to make a diagnosis. In this case, enhancement on T1 with gadolinium suggests leptomeningeal carcinomatosis.