Acoustic neuroma causes

Revision as of 19:30, 23 September 2015 by Simrat Sarai (talk | contribs)
Jump to navigation Jump to search

Acoustic neuroma Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Acoustic neuroma from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

Diagnostic Study of Choice

History and Symptoms

Physical Examination

Laboratory Findings

Electrocardiogram

X-ray

Echocardiography or Ultrasound

CT

MRI

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

Acoustic neuroma causes On the Web

Most recent articles

cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Acoustic neuroma causes

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Acoustic neuroma causes

CDC on Acoustic neuroma causes

Acoustic neuroma causes in the news

Blogs on Acoustic neuroma causes

Directions to Hospitals Treating Acoustic neuroma

Risk calculators and risk factors for Acoustic neuroma causes

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

Overview

Majority of the cases of acoustic neuroma are idiopathic. Less common causes include defect in tumor suppressor genes, and high-dose ionizing radiation.[1]

Causes

  • The cause of acoustic neuromas is largely unknown. No environmental factor has been scientifically proven to cause these tumors, however there is a growing body of evidence that sporadic defects in tumor suppressor genes may give rise to these tumors in some individuals. They can be sporadic or caused by an inherited condition called neurofibromatosis type 2 (NF-2). Sporadic tumors occur 95% of the time, while 5% of acoustic tumors are caused by NF-2. The cause of sporadic form is unclear. Neurofibromatosis type II occurs in individuals who have defective tumor suppressor gene located on chromosome 22q12.2. The defective protein produced by the gene is called merlin or schwannomin.
  • There is no evidence supporting a link between environmental factors and acoustic neuromas. Exposure to high-dose ionizing radiation is the only definite environmental risk factor associated with an increased risk of developing an acoustic neuroma. Other studies have hinted at exposure to loud noise on a consistent basis. One study has shown a relationship between acoustic neuromas and prior exposure to head and neck radiation, and a concomitant history of having had a parathyroid adenoma (tumor found in proximity to the thyroid gland controlling calcium metabolism). There are even controversies on hand held cellular phones. Whether or not the radiofrequency radiation has anything to do with acoustic neuroma formation, remains to be seen. To date, no environmental factor (such as cell phones or diet) has been scientifically proven to cause these tumors. The Acoustic Neuroma Association (ANA) does recommend that frequent cellular phone users use a hands free device to enable separation of the device from the head. The Acoustic Neuroma Association (ANA) does recommend that frequent cellular phone users use a hands free device to enable separation of the device from the head. [2]

References

  1. "Wikipedia acoustic neuroma causes".
  2. "Wikipedia acoustic neuroma causes".

Template:WikiDoc Sources