| Author:
Vinit Amin
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NECT |
CECT |
MRI - T1 |
MRI - T2 |
MRI - FLAIR |
MRI - Diffusion |
MRI - T1 post-contrast |
| Normal
Pineal Gland |
Frequently calcifies. Attenuation is otherwise equal to that of gray matter.
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Pineal lacks blood-brain barrier, enhances uniformly with contrast administration
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May appear isointense to gray matter.
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May appear isointense to gray matter.
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May appear isointense to gray matter.
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No restricted diffusion.
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Uniformly enhances.
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| Germinoma |
Image 1
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Demonstrates intense homogenous enhancement. (No image available.)
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Iso- or hypointense to grey matter.
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Iso- or hyperintense to grey matter.
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Iso- or hyperintense to grey matter.
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High signal intensity in the lesion, a finding indicative of high cellularity. (No image available)
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Homogeneous enhancement.
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Choriocarcinoma |
Frequently seen as a solitary mass with heterogeneously increased attenuation.
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Demonstrates moderate heterogenous enhancement. (No image available.)
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Isointense lesions with small foci of hyperintensity.
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Markedly heterogeneous with areas of both hypointense and hyperintense signal intensity.
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Heterogeneous enhancement, ringlike enhancement, and/or intratumoral nodular enhancement.
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| Teratoma |
Variable. May contain fat, calcification, teeth.Hemorrhage is possible. Tooth is diagnostic.
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May demonstrate relative homogeneous enhancement of the noncalcified solid portions of the tumor.
However, the cystic region does not enhance.
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Heterogeneous mass that may contain varying amounts of hyperintense lipid material. Cystic regions may have higher signal than that of CSF because of proteinaceous material.
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May show enhancement of the soft tissue portions of the lesion.
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| Yolk Sac
Tumor |
Relatively homogeneous, low-attenuation mass that may engulf the pineal calcifications.
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Nonspecific homogeneous enhancement.
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Minimal heterogeneity. Slightly hypointense relative to gray matter.
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Nonspecific homogeneous hyperintensity.
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Nonspecific imaging features.
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Nonspecific imaging features.
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Prominent but slightly heterogeneous enhancement.
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Pineoblastoma |
Hyperdense. Calcifications may explode toward the periphery. May hemorrhage. Usually large and lobulated.
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Demonstrates moderate homogeneous enhancement. (No image available)
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Heterogeneous with the solid portion appearing hypo- to isointense.
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Heterogeneous, may be hyperintense relative to gray matter.
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Demonstrates high signal.
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Hyperintensity within the lesion, a finding suggestive of high cellularity. (No image.)
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Heterogeneous enhancement within the mass.
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Pineocytoma |
Hyperdense. Calcification may engulf the pineal.
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Demonstrates moderate homogeneous enhancement.
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Lobular lesion which may be hypointense compared to brain parenchyma, but higher than CSF.
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Hyperintense lobular lesion.
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Hyperintense lobular lesion.
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Areas of restricted diffusion within the lesion.
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Avidly enhancing mass.
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| Tectal
Glioma |
Iso- or hypodense mass arising from the tectal plate. May demonstrate calcifications and cause aqueductal obstruction. (No image available.)
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Demonstrates variable enhancement. Usually homogeneous. (No image available.)
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Enlargement of the tectal plate. May result in compression of the aqueduct and hydrocephalus.
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Predominantely T2 hyperintense lesion.
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Hyperintense lesion.
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May have minimal or no enhancement.
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| Pineal
Cyst |
Hypodense cystic lesion in region of pineal gland.
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Rim enhancement.
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Ovoid lesion that is hypointense to white matter and close to CSF in signal intensity, with a thin intermediate signal-intensity rim.
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Ovoid lesion that is isointense to CSF with thin intermediate signal-intensity rim.
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Areas of moderately increased signal intensity.
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Typically does not restrict diffusion.
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Most commonly demonstrate rim enhancement, some may demonstrate peripheral, nodular enhancement.
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