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Diffuse Astrocytoma WHO Gr 2

Erbele IDE - MedPix (2010)

View Article: MedPix Image - MedPix Case

Affiliation: Uniformed Services University

ABSTRACT

Diagnosis: Diffuse Astrocytoma WHO Gr 2

History: This patient is a 35 year old man who presents after a fall. He has no history of seizures or focal neurologic deficits.

Findings: Right frontal lobe lesion without midline shift or sulcal effacement, measuring 3.5 x 2.9 x 3.0 cm. On CT, the lesion low attenuation compared to brain. On MRI, it has corresponding low signal on T1 and high on T2. There is no post-contrast enhancement and demonstrates no suppression on FLAIR.

Ddx: • Diffuse astrocytoma (Gr 2 or Gr 3) • Pleomorphic Xanthoastrocytoma (PXA) • Pilocytic astrocytoma • Anaplastic astrocytoma • DNET (dysembryoplastic neuroepithelial tumor) • Neurocysticercosis • Metastasis

Dxhow: Surgical biopsy

Exam: No focal neurologic deficits.

No MeSH data available.


MR Spectroscopy.  Normal brain.  Like the spectrum of the lesion, there are peaks at 3.3, 3.1, and 2.1, representing Choline, Creatinine, and NAA, respectively.  Note the 45 degree angle between these three peaks and x-axis.  This is known "Hunter's Angle" and usually represents normal brain tissue.
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MPX1036_synpic52797: MR Spectroscopy. Normal brain. Like the spectrum of the lesion, there are peaks at 3.3, 3.1, and 2.1, representing Choline, Creatinine, and NAA, respectively. Note the 45 degree angle between these three peaks and x-axis. This is known "Hunter's Angle" and usually represents normal brain tissue.


Diffuse Astrocytoma WHO Gr 2

Erbele IDE - MedPix (2010)

MR Spectroscopy.  Normal brain.  Like the spectrum of the lesion, there are peaks at 3.3, 3.1, and 2.1, representing Choline, Creatinine, and NAA, respectively.  Note the 45 degree angle between these three peaks and x-axis.  This is known "Hunter's Angle" and usually represents normal brain tissue.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=MPX1036&req=5

MPX1036_synpic52797: MR Spectroscopy. Normal brain. Like the spectrum of the lesion, there are peaks at 3.3, 3.1, and 2.1, representing Choline, Creatinine, and NAA, respectively. Note the 45 degree angle between these three peaks and x-axis. This is known "Hunter's Angle" and usually represents normal brain tissue.

View Article: MedPix Image - MedPix Case

Affiliation: Uniformed Services University

ABSTRACT

Diagnosis: Diffuse Astrocytoma WHO Gr 2

History: This patient is a 35 year old man who presents after a fall. He has no history of seizures or focal neurologic deficits.

Findings: Right frontal lobe lesion without midline shift or sulcal effacement, measuring 3.5 x 2.9 x 3.0 cm. On CT, the lesion low attenuation compared to brain. On MRI, it has corresponding low signal on T1 and high on T2. There is no post-contrast enhancement and demonstrates no suppression on FLAIR.

Ddx: • Diffuse astrocytoma (Gr 2 or Gr 3) • Pleomorphic Xanthoastrocytoma (PXA) • Pilocytic astrocytoma • Anaplastic astrocytoma • DNET (dysembryoplastic neuroepithelial tumor) • Neurocysticercosis • Metastasis

Dxhow: Surgical biopsy

Exam: No focal neurologic deficits.

No MeSH data available.