Critical Imaging Diagnoses: - Radiology

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PML MR and CT Imaging Checklists • Morphologic Features – Mass Effect • Yes, proportional • Less than expected • No mass effect – Abnormal WM Signal • Vasogenic Edema • Demyelination • Infiltrating neoplasm – Ring Lesion • Necrotic Neoplasm • Reactive (e.g. abscess) • Fluid or Inflammatory WHO Gr 2 Astrocytoma (“gliomatosis gliomatosis cerebri”) (“edema” w/o contrast enhancement) Gliomatosis Cerebri: Diffuse Astrocytoma – 2 lobes NOTE: Although this looks like “vasogenic edema” – there is no enhancement. Vasogenic edema often spares the internal capsule. This is NOT edema secondary to a lesion. This is the tumor itself infiltrating through the white-matter. T2 T1-gad Infiltrates through White Matter Tracts Gliomatosis Cerebri CHO Cr NAA ? {
T1W Gd+ + in Two Astrocytomas Without Contrast Enhancement, it can’t be “vasogenic” edema? Why does it look like like interstitial vasogenic edema? Microcystic change Gr 4 Astrocytoma Neovascularity w/BBB causes contrast Enhancement and “vasogenic” edema Gr 2 Astrocytoma MR and CT Imaging Checklists • Morphologic Features – Mass Effect • Yes, proportional • Less than expected • No mass effect – Abnormal WM Signal • Vasogenic Edema • Demyelination • Infiltrating neoplasm – Ring Lesion • Necrotic Neoplasm • Reactive (e.g. abscess) • Fluid or Inflammatory MR and CT Imaging Checklists • Morphologic Features – Mass Effect • Yes, proportional • Less than expected • No mass effect – Abnormal WM Signal • Vasogenic Edema • Demyelination • Infiltrating neoplasm – Ring Lesion • Necrotic Neoplasm • Reactive (e.g. abscess) • Fluid or Inflammatory MR and CT Imaging Checklists Fever, HA, Recent Dental work • Morphologic Features – Mass Effect • Yes, proportional • Less than expected • No mass effect – Abnormal WM Signal • Vasogenic Edema • Demyelination • Infiltrating neoplasm – Ring Lesion • Necrotic Neoplasm • Reactive (e.g. abscess) • Fluid or Inflammatory Abscess Mag. susceptibility from atomic oxygen in macrophages
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Page 7 and 8: MR and CT Imaging Checklists • An
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Page 17 and 18: MR and CT Imaging Checklists • Mo
Page 19: T2W - Geographic hyperintensity FLA
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Page 25: T1W Gd+ + in Two Astrocytomas Witho

Critical Imaging Diagnoses: - Radiology

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