Figure 9.1 Axial MRI brain with evidence of multiple left hemispheric infarcts (arrows) on diffusion-weighted imaging (DWI). Discussion This case highlights the critical importance of a detailed history and physical…
Figure 3.1 Unenhanced CT show signs of acute stroke of the left MCA territory. (a) Hyperdense left MCA sign, in which high attenuation thrombus is seen extending from the left…
Figure 12.1 Schematic diagram of the investigation of thunderclap headache. CT, computed tomography; MRI, magnetic resonance imaging; MRA, magnetic resonance angiography; MRV, magnetic resonance venography; TCD, transcranial Doppler; DSA, digital…
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…
