Figure 2.1 Flow voids in the basal ganglia are demonstrated bilaterally on axial T1 MRI (see arrows). This is representative of hypertrophy of the basal ganglia perforator arteries. Figure 2.2…
Figure 5.1 Axial diffusion-weighted (right) and apparent diffusion coefficient (left) images show evidence of restricted diffusion in the right MCA distribution consistent with an acute cerebral infarction. Discussion Prosthetic heart…
Figure 7.1 (a) Bilateral pontine and left temporo-occipital infarcts on diffusion-weighted imaging consistent with acute infarct in basilar artery and posterior cerebral artery territories. (b) Dense basilar artery on initial…
NASOPHARYNGEAL MASSES KEY FACTS Most common tumors: squamous cell carcinoma (>80%), adenocarcinoma, minor salivary gland tumors, and lymphoma. It is not clear if tobacco and alcohol use…
ASTROCYTOMA, LOW GRADE KEY FACTS Account for 10% to 30% of cerebral gliomas in adults. Histologically, low-grade astrocytomas are fibrillary (diffuse), and over 80% eventually degenerate to…
MENINGITIS (UNCOMPLICATED) KEY FACTS Common causative organisms include Escherichia coli (E. coli) and streptococcus group B (newborns), Hemophilus (H. influenzae) (children <7 years), Neisseria (N. meningitides) (older children…
VERTEBRAL METASTASES KEY FACTS Vertebral métastases occur in 5% to 10% of all cancer patients, especially those with primary tumors in the breast, prostate, uterus, and lung; myeloma;…
AQUEDUCTAL STENOSIS KEY FACTS Accounts for 20% ofallhydrocephalus cases; generally presents in infancy but may manifest at any time. This spectrum of disorders includes congenital narrowing of…
