More articles from BRAIN
- Utility of Proton MR Spectroscopy for Differentiating Typical and Atypical Primary Central Nervous System Lymphomas from Tumefactive Demyelinating Lesions
The utility of MRS in differentiating lymphoma from tumefactive demyelination was assessed in 44 patients with the former and 21 with the latter. A Cho/Cr over 2.58 and a high lipid/lactate peak were more common in lymphoma, therefore MRS may help in differentiating these 2 entities.
- Preferential Location for Arterial Dissection Presenting as Golf-Related Stroke
Seven patients with golf-related strokes were imaged and the literature was reviewed for similar cases, which generated a total 14 such occurrences. The most common time of symptom onset occurred during the golf swing and over one-half of patients damaged an extracranial vertebral artery with most dissections involving the right side. Of a total of 14 dissections, 7 patients had complete symptom resolution and returned to normal.
- Subcortical Cystic Lesions within the Anterior Superior Temporal Gyrus: A Newly Recognized Characteristic Location for Dilated Perivascular Spaces
Fifteen patients with unusual dilated perivascular spaces in the subcortical white matter of the anterior superior temporal gyrus were presented. In one, pathology showed gliosis and innumerable perivascular spaces. Findings that suggest cysts in this location were perivascular spaces include: lack of symptoms, proximity to the subarachnoid space, adjacent blood vessels, and stability over time.
- Use of FLAIR Imaging to Identify Onset Time of Cerebral Ischemia in a Canine Model
After an infarction-inducing procedure, 20 dogs were imaged at 3, 4, 5, 6, and 24 hours with FLAIR and DWI. A mismatch between the 2 sequences (positive DWI and negative FLAIR) was found to reliably predict the time of infarct onset. By 6 hours, 95% of dogs had FLAIR abnormalities and by 24 hours all did. However, at 3 hours only 15% of dogs showed positive FLAIR studies. These results could serve as guidelines to estimate the time of onset of ischemic events.