Patient 4.A, Axial T2-weighted scan shows a huge extra-axial cyst (white arrows) with septation (black arrow) that displaces the corpus callosum posteriorly.B,

Slides:

Advertisements

Similar presentations

Patient 7. Patient 7. Sagittal postcontrast T1-weighted scan showing a large, well-delineated extra-axial mass (arrows) elevating and displacing the pons.

Advertisements

Axial T1-weighted image after contrast administration (A) and a FLAIR image (B) demonstrating a left parietal subcortical DVA with deep venous drainage.

Mural cholesteatoma. Mural cholesteatoma. Axial (A) and coronal (B) HRCT scans show the shell of the cholesteatoma in the epitympanum (black arrow) and.

Patient with cholesteatoma on the right and chronic otitis media without cholesteatoma on the left. Patient with cholesteatoma on the right and chronic.

A young adult with intractable seizures.

A–C, Case 1. A–C, Case 1. Typical white matter changes involving the corpus callosum and the pyramidal tracts (A and C, arrows), dilation of the lateral.

A, Measurement of the angle between the TS-OP line and the hard palate in the lateral scout view of the brain CT (black arrow). A, Measurement of the angle.

66-year-old woman with well-differentiated squamous cell carcinoma of lower gingiva.A, Axial T1-weighted MR image of metastatic submandibular node (arrow)

Serial axial T2-weighted images (2000/110/2 at treatment, 3400/100/4 at 6 months and 4000/100/3 at 10 months and 36 months after treatment) in a 52-year-old.

Patient 14. Patient 14. Secondary progressive MS. Axial contrast-enhanced T1-weighted MR image (600/27/1 [TR/TE/excitation]). A, No enhanced lesion can.

FLAIR scan, FA map, and fiber tracking in a 38-year-old patient with TBI who was imaged 2 weeks after the initial trauma. FLAIR scan, FA map, and fiber.

Patient 1, a 15-day-old neonate who presented with encephalopathy

A, 55-year-old woman who underwent superficial parotidectomy 22 years before recurrence. A, 55-year-old woman who underwent superficial parotidectomy 22.

Patient 9. Patient 9. A 31-year-old man with mental status changes and seizure activity.A, T2-weighted axial MR image shows bilateral frontal and right.

T2-weighted images of a patient with an infarction within the anterior MCA branch territory on day 5 (patient 15) show high SI changes within the ipsilateral.

Coronal FLAIR images (A–C) document decreasing left hippocampal mass effect and signal intensity over 5-year period (black arrowhead). Coronal FLAIR images.

Sarcoma growing into the left maxilla.

Same patient as shown in figure 3.

Patient 5. Patient 5. Initial axial, half cut, and magnified MR images of a 39-year-old man with spontaneous intracranial hypotension who presented with.

A 33-year-old man presented with sudden and progressive changes in consciousness after prolonged voluntary food starvation.A, Axial FLAIR (11000/140/2.

A, Sagittal view through the brain stem and cervical spinal cord shows the extent of T2 hyperintensities involving the pyramidal tract and posterior columns.

Patient 12. Patient 12. A 43-year-old woman with headache, blurred vision, and mental status change.A, T2-weighted axial MR image shows bilateral centrum.

Supratentorial and posterior fossa PML

Involvement of the frontal and parietal lobes in patients with isolated cortical hyperintensities. Involvement of the frontal and parietal lobes in patients.

Images in a 49-year-old women with leptomeningeal carcinomatosis from adenocarcinoma of the lung. Images in a 49-year-old women with leptomeningeal carcinomatosis.

Adrenoleukodystrophy (A and B) and peroxisomal acyl-coenzyme A oxidase deficiency (C). Adrenoleukodystrophy (A and B) and peroxisomal acyl-coenzyme A oxidase.

Transverse FLAIR (bottom row) and DIR (top row) sections of the supratentorial brain. Transverse FLAIR (bottom row) and DIR (top row) sections of the supratentorial.

A, FLAIR demonstrating acute infarct within a superficial distribution

Axial T2-weighted MR imaging at the level of the internal auditory canals, demonstrating a large, homogeneous mass filling the right internal auditory.

Ill-defined margins as a sign of malignancy.

Case 1. Case 1. A, Contrast-enhanced T1-weighted axial image (spin-echo sequence with parameters 600/14 [TR/TE]) shows an enhanced lesion from the splenium.

Typical supratentorial right frontal cPML in an HIV-positive patient.

A 7-day old neonate, the older sister of patient 1, also presented with neonatal encephalopathy.Axial fast spin-echo T2-weighted image (130/4200/1[TE/TR/NEX])

T2-weighted (A), FLAIR (B), and isotropic DWI (C) of a unilateral lesion in a patient with an acute or chronic presentation of worsening right-sided weakness.

Patient 2: group BG lesion pattern.

Signal characteristics of PML

Case 1. Case 1. Axial NCCT demonstrates bilateral subdural collections, slightly hyperattenuating to CSF (white arrows). The collections are hyperintense.

Coronal postcontrast T1-weighted image of the orbits in patient 1 demonstrates a heterogeneously enhancing ovoid lesion involving the right medial rectus.

Patient 1. Patient 1. Axial fluid-attenuated inversion recovery (FLAIR) imaging (A), diffusion-weighted imaging (DWI) (B), and apparent diffusion coefficient.

Follow-up prenatal MR imaging at 36 weeks’ gestation.

1, Axial T2 image in patient 1 demonstrates bilateral cystic spaces in the biparietal periventricular white matter. 2, Axial T2 image in patient 2 demonstrating.

A 47-year-old woman with a history of alcohol abuse presented with ataxia, changes in consciousness, and ocular abnormalities. A 47-year-old woman with.

Ultrasonography (A–C) and MR imaging (D and E) (time interval, 7 days) from an infant with NKHG.A–C, Sagittal views showing (A) a hypoplastic corpus callosum.

A, Axial diffusion-weighted image (b = 1000) demonstrates increased signal intensity in the head of the right caudate nucleus (arrow).B, Axial apparent.

Axial T2 (A) and axial T2 FLAIR (B) images show periventricular white matter hyperintensities (arrows), prominent Virchow-Robin spaces (arrowheads), ventriculomegaly,

Images from the case of an 8-year-old female patient with complex I mitochondrial disease, which was diagnosed when the patient was older than 3 years.

MR images of the brain (axial sections, fluid-attenuated reversion recovery sequences) show the symmetric hyperintensities (arrows) involving the pyramidal.

Fourth ventricular CSF pulsation artifact in four subjects.

A 43-year-old male patient with headaches (case 33).

Typical disease course of cPML in an HIV-positive patient receiving HAART. Top panel, a set of images at presentation with focal diffusion restriction.

Axial T2-weighted image (A) demonstrates focal cortical dysplasia (arrow) centered in the left anterior temporal lobe in a right-handed patient. Axial.

A 64-year-old man with an intra-abdominal abscess (patient 3).

A, Axial T2-weighted image (3500/90/2) shows a well-defined deep right occipital white matter lesion (asterisk) and a subcortical linear hyperintensity.

Typical imaging presentation on FLAIR

Axial T2-weighted MR image shows normal flow void in the right internal jugular vein (arrows), whereas flow-related enhancement can be seen in the left.

A, Axial T2-weighted image from a routine high-resolution 3T screening study to evaluate internal auditory canal lesions shows the right CNIII entering.

ADC and astrocytoma grade.

Images of a 12-year-old male patient with X-linked ALD with stable neurologic function. Images of a 12-year-old male patient with X-linked ALD with stable.

Contrast-enhanced axial CT scan through the larynx with soft-tissue reconstruction demonstrates complete ossification of the thyroid (white arrow) and.

A, Axial T1- weighted MR image shows a predominantly isointense lesion in the right parietal bone. A, Axial T1- weighted MR image shows a predominantly.

Patient 8. Patient 8. A 55-year-old man with postural headache and low CSF pressure on lumbar puncture. Axial CTM (A), axial MRM (B), and coronal MRM (C)

A left centrum semiovale lesion in a 30-year-old woman with relapsing-remitting MS; the time lapse between 3T and 7T scans was 6 months. A left centrum.

Persistent diffusion abnormalities in the brain stem of patient 2.

A–C, Axial T2-weighted images 7 days after the ictus, demonstrating punctate hyperintensities throughout the white matter, on a background of slightly.

Axial fluid-attenuated inversion recovery MR of same patient as in Fig 1 done 19 days later (patient remained hospitalized) now showing an isointense area.

Twelve-year-old girl with coinfection of JE and NCC (patient 5).

Chronic CNS-IRIS without coinfection.

Marked progression of PML documented by serial MR studies

Subject 4. Subject 4. Axial CT scan at the level of the common crus (black arrow) shows a large bone defect caused by presumed AG (white arrow), located.

50-year-old woman with history of left parieto-temporo-occipital glioblastoma multiforme and new abnormal enhancement on follow-up imaging after surgery.

Presentation transcript:

Patient 4.A, Axial T2-weighted scan shows a huge extra-axial cyst (white arrows) with septation (black arrow) that displaces the corpus callosum posteriorly.B, Axial FLAIR image in the same patient shows that the cyst fluid (open arrows) does not suppress a... Patient 4.A, Axial T2-weighted scan shows a huge extra-axial cyst (white arrows) with septation (black arrow) that displaces the corpus callosum posteriorly.B, Axial FLAIR image in the same patient shows that the cyst fluid (open arrows) does not suppress and remains hyperintense compared with CSF. NE cyst was found at surgery. This lesion is unusual because of its supratentorial location and size. The rim of hyperintensity posteromedial to the cyst probably represents compressed brain, not the cyst wall itself, which is a single cell layer. The hyperintensity in the center of the lesion was not seen on any other images and is probably an artifact. M.T. Preece et al. AJNR Am J Neuroradiol 2006;27:1211-1216 ©2006 by American Society of Neuroradiology