What Does Non Specific Debris Within The Mastoid Mean?
FINDINGS: Ventricular and cortical sulcal sizes are compatible with the patient's age. No midline shift. No extracerebral fluid collections. No regions of recent hemorrhage, acute infarction, or restricted diffusion. The vertebrobasilar and carotid artery flow-voids are well demonstrated at the skull base levels. There are multiple zones of abnormal high T2 FLAIR signal in the cerebral hemispheres bilaterally, particularly involving the frontal subcortical and periventricular white matter regions. Several small lesions are new or enlarging compared with the prior scan, particularly at the right trigone and in the basal ganglia. There is a small amount of nonspecific debris within the left mastoid air cells, decreased compared with the prior study, . what does this mean?