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Brain Neoplasm

Brain Neoplasm. Brain Neoplasm. Benign May have aggressive tendencies May transition to more aggressive lesion Tends to be slower growing Primary malignant Age distribution for various tumors Impact due to mass effect or invasion Metastatic History of pre-existing neoplasm

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Brain Neoplasm

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  1. Brain Neoplasm

  2. Brain Neoplasm • Benign • May have aggressive tendencies • May transition to more aggressive lesion • Tends to be slower growing • Primary malignant • Age distribution for various tumors • Impact due to mass effect or invasion • Metastatic • History of pre-existing neoplasm • May be primary presentation • Brain MRI modality of choice

  3. Astrocytoma • Irregular low attenuation lesion (CT) • Isodense to gray matter central area • Relatively ‘low grade’ • Surrounding edema (black)

  4. Astrocytoma • MRI • Parietal lesion • White representing surrounding edema on T2 images • Contrast enhancement on T1+C T2 T2 T1+C T1

  5. Meningioma • Medial posterior mass adjacent to the meninges • Slow growing • Minimal mass effect • Intense enhancement T2 T1 T1+C T1+C

  6. Meningioma • Extra-axial lesion • Impact based on mass effect • May be quite large without symptoms

  7. Cystic Astrocytoma • Cystic mass in posterior fossa • Rim and mural nodule enhancement on contrast – far right image at arrows

  8. Metastatic Brain Tumor • Multiple ring enhancing lesions • Brain edema (white rim T2) • Known lung cancer T2 PD T1 T1+C

  9. Lung Neoplasm • Nodule upper right lung field • Patient with brain metastases

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