Aarskog Syndrome

(Aarskog-Scott Syndrome; Faciodigitogenital Dysplasia or Syndrome; Faciogenital Dysplasia; Shawl Scrotum Syndrome)

by Rick Alan

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Definition | Causes | Risk Factors | Symptoms | Diagnosis | Treatment | Prevention

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Definition

Aarskog syndrome is an extremely rare genetic disorder. This syndrome causes changes in the size and shape of certain bones and cartilage in the body. The face, fingers, and toes are most often affected.

 

Causes

Aarskog syndrome is an inherited disorder. It is caused by a gene mutation on the X chromosome. It is passed from mothers to male children.

 

Risk Factors

A risk factor is something that increases your chance of getting a disease or condition. This disorder mainly affects males.

Those at risk of inheriting Aarskog syndrome are male children of:

• Mothers who do not have the disorder, but who carry the gene for it

 

Symptoms

The main symptoms of Aarskog syndrome are:

• Disproportionately short stature
• Abnormalities of the head and face, including:
  • Rounded face
  • Wide-set eyes
  • Slightly slanted eyes
  • Drooping eyelids
  • Small nose
  • Front-facing nostrils
  • Underdeveloped mid-portion of the face
  • Wide groove above the upper lip
  • Crease below the lower lip
  • Folding of the top portion of the ear
  • Delayed teeth growth
  • In some cases, cleft lip or palate

Other symptoms may include:

• A malformed scrotum
• Undescended testicles
• Small, wide hands and feet
• Short fingers and toes
• In some cases, mild webbing of fingers and toes, or simian crease in palm of hand
• Abnormalities of the sternum (mildly sunken chest)
• Protruding navel
• Inguinal hernias
• Ligament problems, resulting in hyperextension of the knees
• Mild mental deficiencies (in about one-third of those affected)

 

Diagnosis

The doctor will ask about your symptoms and medical history. A physical exam will be done. The diagnosis of Aarskog syndrome is usually based on facial characteristics. The diagnosis can be confirmed by x-rays of the face and skull.

 

Treatment

There is no known cure for Aarskog syndrome. Treatment is limited to surgical procedures to treat conditions caused by the disorder and supportive treatment. Orthodontic treatment is often needed, as well. Researchers have located abnormalities in the FGD1 gene in people with this syndrome, and genetic testing for mutations in this gene may be available.

Treatment may include:

 

Prevention

There is no known way to prevent Aarskog syndrome. If you have Aarskog syndrome or have a family history of the disorder, you can talk with a genetic counselor when deciding to have children.

 RESOURCES:

International Birth Defects Information Systems
http://www.ibis-birthdefects.org/

National Organization for Rare Disorders
http://www.rarediseases.org/

 CANADIAN RESOURCES:

Health Canada
http://www.hc-sc.gc.ca/index-eng.php/

Ontario March of Dimes
http://www.marchofdimes.ca/dimes/

REFERENCES:

Aarskog syndrome. National Organization for Rare Disorders website. Available at: http://www.raredis.... Accessed July 22, 2009.

Aarskog syndrome. US National Library of Medicine, Medline Plus website. Available at: http://www.nlm.nih.gov/medlineplus/ency/article/001654.htm. Updated February 2008. Accessed July 22, 2009.

Emery and Rimoin’s Principal and Practice of Medical Genetics. 3rd ed. New York, NY: Churchill Livingstone; 1997.

National Organization for Rare Disorders, NORD Guide to Rare Disorders. Philadelphia: Lippincott Williams & Wilkins, 2003.

Pasteris NG, Nagata K, Hall A, Gorski J. Isolation, characterization and mapping of mouse Fgd3 gene, a new faciogenital dysplasia (FGD1; Aarskog Syndrome) gene homologue. Gene. 2000;242:237-247.

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Last reviewed November 2009 by Rosalyn Carson-DeWitt, MD
Last Updated: 11/3/2009