Oligodendroglioma MRI

Oligodendroglioma Microchapters
Home
Patient Information
Overview
Historical Perspective
Classification
Pathophysiology
Causes
Differentiating Oligodendroglioma from other Diseases
Epidemiology & Demographics
Risk Factors
Screening
Natural History, Complications, and Prognosis
Diagnosis
Staging
History & Symptoms
Physical Examination
Laboratory Findings
Chest X Ray
CT
MRI
Ultrasound
Other Imaging Findings
Other Diagnostic Studies
Treatment
Medical Therapy
Surgery
Primary Prevention
Secondary Prevention
Cost-Effectiveness of Therapy
Future or Investigational Therapies
Case Studies
Case #1
Oligodendroglioma MRI On the Web
Most recent articles
Most cited articles
Review articles
CME Programs
Powerpoint slides
Images
American Roentgen Ray Society Images of Oligodendroglioma MRI All Images X-rays Echo & Ultrasound CT Images MRI
Ongoing Trials at Clinical Trials.gov
US National Guidelines Clearinghouse
NICE Guidance
FDA on Oligodendroglioma MRI
CDC on Oligodendroglioma MRI
Oligodendroglioma MRI in the news
Blogs on Oligodendroglioma MRI
Directions to Hospitals Treating Oligodendroglioma
Risk calculators and risk factors for Oligodendroglioma MRI

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Sujit Routray, M.D. [2]

Overview

Brain MRI is helpful in the diagnosis of oligodendroglioma. On brain MRI, oligodendroglioma is characterized by a mass which is typically hypointense on T1-weighted images and hyperintense on T2-weighted images. Calcification is observed on T2* component of MRI.

MRI

• Brain MRI may be helpful in the diagnosis of oligodendroglioma.
• Findings on MRI suggestive of oligodendroglioma are listed below:

MRI component	Findings
T1	Typically hypointense
T2	Typically hyperintense Enlargement of the lateral ventricles and the third ventricle with periventricular high intensity signal suggestive of transependymal absorption or tumor spreading
T2*	Calcification observed as areas of "blooming"
T1 C+ (Gd)	Homogenous contrast enhancement
DWI	Typically no diffusion restriction

Gallery

• 
  MRI axial FLAIR showing a relatively well circumscribed mass involving the temporal lobe and insular cortex, without convincing enhancement, and minimal restricted diffusion.
• 
  MRI including post contrast sequences demonstrates a large mass involving the majority of the left frontal lobe, which exerts significant mass effect resulting in midline shift and effacement of the frontal horn of the lateral ventricle. The mass is heterogeneous, but predominantly hypointense on T1 with a surrounding mantle of tumor edema. Following contrast there is heterogeneous moderate enhancement.
• 
  MRI including post contrast sequences demonstrates a large mass involving the majority of the left frontal lobe, which exerts significant mass effect resulting in midline shift and effacement of the frontal horn of the lateral ventricle. The mass is heterogeneous, but predominantly hyperintense on T2 with a surrounding mantle of tumor edema. Following contrast there is heterogeneous moderate enhancement.
• 
  A left frontal lobe mass with central haemorrhagic component is present (intrinsic high T1, low T2) with a peripheral region of enhancement and high T2 signal. Some of the enhancement may be in reaction to the haemorrhage, depending on the time course.
• 
  A sharply defined zone of abnormal slightly heterogeneous signal in the left parietal lobe extends to involve the medial cortex of the superior parietal lobule. Inferiorly it abuts and distorts the cingulate gyrus. Superiorly it is significantly posterior to the precentral gyrus and slightly posterior to the left post central gyrus. Posterior and laterally it extends to and distorts the left intraparietal sulcus. It extends to within 1 cm of the parieto-occipital fissure postero-medially, slightly posteriorly bowing it. It exhibits no restricted diffusion and no pathological contrast enhancement.

References

Template:WikiDoc Sources