Headache. Suggestion of a colloid cyst on a recent CT scan. The study is limited by artifact from dental braces. This obscures a significant part of the anterior frontal and temporal lobes as well as the posterior fossa on diffusion and susceptibility weighted imaging and causes significant artifact on the other sequences. There is no acute infarct or intracranial hemorrhage in the posterior superior part of the brainIn the very anterior aspect of the third ventricle and just posterior to the fornices, there is question of a subcentimeter T1 isointense, T2-hyperintense (relative to gray matter) structure that is eccentric to the right, but this is not definitively seen. The ventricles are normal in size as well as the other CSF-containing spaces. There are few nonspecific scattered T2/FLAIR-hyperintense foci in the cerebral white-matter. The brain shows no gross abnormality otherwise. There is no mass-effect or midline shift. The major intracranial vascular flow voids are preserved. There is no destructive skull lesion and the mastoid air cells are clear. The paranasal sinuses are obscured.
Limited examination due to patient's braces. There remains a question of a subcentimeter lesion at the foramen of Monro/anterior third ventricle possibly representing a colloid cyst. Due to artifact however the presence of this lesion cannot be confirmed. As such would recommend a follow-up study with gadolinium including 3-D T1 and 3-D T2 sequences at 3 Tesla, preferably without dental hardware if possible. MRI examination of the brain is otherwise unremarkable for age without evidence of intracranial mass effect or hydrocephalus.