Oligodendroglioma other diagnostic studies

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 other diagnostic studies On the Web
Most recent articles
Most cited articles
Review articles
CME Programs
Powerpoint slides
Images
American Roentgen Ray Society Images of Oligodendroglioma other diagnostic studies All Images X-rays Echo & Ultrasound CT Images MRI
Ongoing Trials at Clinical Trials.gov
US National Guidelines Clearinghouse
NICE Guidance
FDA on Oligodendroglioma other diagnostic studies
CDC on Oligodendroglioma other diagnostic studies
Oligodendroglioma other diagnostic studies in the news
Blogs on Oligodendroglioma other diagnostic studies
Directions to Hospitals Treating Oligodendroglioma
Risk calculators and risk factors for Oligodendroglioma other diagnostic studies

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Sara Mohsin, M.D.[2]Sujit Routray, M.D. [3]

Overview

Other diagnostic studies for oligodendroglioma include biopsy (homogeneous, compact, rounded cells with distinct borders and clear cytoplasm surrounding a dense central nucleus and perinuclear halo) and fluorescent in-situ hybridization (FISH) technique (deletions of chromosome 1p and 19q).

Other Diagnostic Studies

Biopsy

• Biopsy may be performed to help confirm the diagnosis of oligodendroglioma.
• On biopsy, oligodendroglioma is characterized by homogeneous, compact, rounded cells with distinct borders and clear cytoplasm surrounding a dense central nucleus and perinuclear halo, giving it the characteristic “fried egg” appearance.
• Biopsy may be done at the time of surgical resection of oligodendroglioma.
• Biopsy may be of two types:
  • Open biopsy
  • Stereotactic biopsy
• Indications for open biopsy and stereotactic biopsy are described below:

Indications for different types of biopsies

Type of biopsy	Indications
Open biopsy	Surgically resectable masses Lesions in accessible and relatively “silent” areas of the brain or in areas of the brain with a mild postoperative neurologic deficit Appearance consistent with tumor on the MRI Large tumors exerting mass effect
Stereotactic biopsy	Deep-seated tumor that is not amenable to resection Lesions in which the radiological and clinical findings are ambiguous Diffuse or multiple lesions Appearance that suggests a lymphoma, which would not require resection Change in the appearance of a previously diagnosed or treated tumor Assessment of tumor after treatment (to distinguish between radiation necrosis and tumor recurrence)

Fluorescent in-situ hybridization (FISH) technique

• FISH demonstrates deletions of chromosome 1p and 19q.

References

Template:WikiDoc Sources