42 years Male (DOB:1/30/1974)Reason: h/o brain abscess. This will be 6 weeks into treatment to assess for resolution. History: headache, mass on MRIPROVIDER/ATTENDING NAME: EMILY M LANDON EMILY M LANDON Since the prior exam a ring-enhancing lesion located in the left gyrus rectus and previously measuring 16 x 25 mm currently is not ring-enhancing. It appears to also enhance centrally. It currently measures 17 x 11 mm axial dimensions. There is a low signal rim present along the left gyrus rectus enhancing lesion measuring 10 x 8 mm axial dimensions on the current exam and 13 x 19 mm axial dimensions on the prior exam. There is redemonstration of surrounding vasogenic edema which has decreased since the prior exam. The T2 hyperintense signal measures approximately 26 x 57 mm on the current exam and previously measured 69 x 39 mm axial dimensions.Foci of encephalomalacia are present in medial left occipital lobe and in the left cerebellar hemisphere. These are stable compared to the prior exam.There are several periventricular and subcortical punctate hyperintense white matter lesions present identified on the FLAIR and T2 images.A linear focus of T2 and FLAIR signal hyperintensity extends through the left frontal calvarial burr hole into the left frontal lobe lesion. This probably represents a prior tract for biopsy/aspiration.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
1.Since the prior examination a left frontal lobe abscess continues to regress in size but the MR abnormality has not resolved.2.Foci of encephalomalacia are redemonstrated in the left cerebellar hemisphere and left occipital lobe.