Previous MRI suggestive of periventricular heterotopias: Head jerking while asleep. There are several subcentimeter nodular foci with grey-matter signal characteristic along the margins of the bilateral lateral ventricles in the temporal and occipital lobes. There appear to be terminal zones of myelination. The degree of myelination is otherwise age-appropriate. There is no evidence of intracranial hemorrhage or infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is extensive diffuse paranasal sinus mucosal thickening and fluid. There is fluid within the right mastoid air cells. The orbits are unremarkable. Enlargement of the right endolymphatic duct is better depicted on the concurrent temporal bone CT.
1. Multiple nodular foci grey-matter signal within the bilateral periventricular white matter are compatible with grey matter heterotopia. 2. Right mastoid effusions may represent mastoiditis.3. Findings suggestive of acute sinusitis.4. Enlargement of the right endolymphatic duct is better depicted on the concurrent temporal bone CT.