Have a symptom?
See what questions
a doctor would ask.
Diseases » Trisomy 18 Syndrome » Summary

What is Trisomy 18 Syndrome?

What is Trisomy 18 Syndrome?

  • Trisomy 18 Syndrome: A rare genetic chromosomal syndrome where the child has an extra third copy of chromosome 18. Most fetuses are aborted before term, but a live birth with this condition occurs with a frequency around 1-in-3000. Edwards syndrome is more severe than the more common Down syndrome. Edwards syndrome causes mental retardation and numerous physical defects that often cause an early infant death. The condition has variable severity depending on how many of the body's cells have the extra chromosome and how much of the extra chromosome is duplicated. In severe forms all cells have an extra copy of the complete chromosome 18 whereas milder forms may have only some cells having the extra chromosome. Other mild forms may have an extra copy of only part of chromosome 18 in some or all of the body cells.

Trisomy 18 Syndrome: Introduction

Types of Trisomy 18 Syndrome:

Broader types of Trisomy 18 Syndrome:

How serious is Trisomy 18 Syndrome?

Prognosis of Trisomy 18 Syndrome: The prognosis varies depending on the nature and severity of symptoms present in individual cases. Roughly half of the patients die during early infancy. Survival into the teens does occur but patients often have severe health problems.
Complications of Trisomy 18 Syndrome: see complications of Trisomy 18 Syndrome

What causes Trisomy 18 Syndrome?

Causes of Trisomy 18 Syndrome: see causes of Trisomy 18 Syndrome

What are the symptoms of Trisomy 18 Syndrome?

Symptoms of Trisomy 18 Syndrome: see symptoms of Trisomy 18 Syndrome

Complications of Trisomy 18 Syndrome: see complications of Trisomy 18 Syndrome

Trisomy 18 Syndrome: Testing

Diagnostic testing: see tests for Trisomy 18 Syndrome.

How is it treated?

Doctors and Medical Specialists for Trisomy 18 Syndrome: Medical Geneticist ; see also doctors and medical specialists for Trisomy 18 Syndrome.
Treatments for Trisomy 18 Syndrome: see treatments for Trisomy 18 Syndrome

Name and Aliases of Trisomy 18 Syndrome

Main name of condition: Trisomy 18 Syndrome

Other names or spellings for Trisomy 18 Syndrome:

Trisomy 18, Edwards syndrome


By using this site you agree to our Terms of Use. Information provided on this site is for informational purposes only; it is not intended as a substitute for advice from your own medical team. The information on this site is not to be used for diagnosing or treating any health concerns you may have - please contact your physician or health care professional for all your medical needs. Please see our Terms of Use.

Home | Symptoms | Diseases | Diagnosis | Videos | Tools | Forum | About Us | Terms of Use | Privacy Policy | Site Map | Advertise