Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified [R93.0] / Transient alteration of awareness [R40.4] / Headache [R51], Reason for Study: ^Reason: evaluate for demyelinating or ischemic lesions History: headaches, prior abnormal MRI. Previously demonstrated FLAIR high signal intensity lesions on the left inferior frontal lobe and vermis appear to be stable, no change in size, extent and signal intensity suggesting likely to be chronic ischemic lesion but again cannot completely exclude possibility of demyelinating lesion.There is no other lesion seen on this scan.There is no evidence of acute ischemic or hemorrhagic lesion on this scan.There is no evidence of abnormal enhancement.The ventricles, sulci and cisterns are symmetric and unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The mastoid air cells are clear. Retention cyst on the right side of the sphenoid sinus.
1. No change of left inferior frontal lobe and vermis FLAIR high signal intensity lesion since prior scan. No new lesion is seen. Thus, those lesions may represent chronic ischemic lesion but again cannot completely exclude the possibility of demyelinating lesion. 2. No evidence of acute ischemic or hemorrhagic lesion. No abnormal enhancement. 