Menkes syndrome is an inborn error of metabolism in which cells in the body can absorb copper, but are unable to release it.
Causes of Menkes syndrome
Menkes syndrome is caused by a defect in the ATP7A gene. The defect makes it hard for the body to distribute copper in food from the intestines into the bloodstream for use in other areas. As a result, the brain and other parts of the body do not get enough copper.
Copper can build up in the small intestine and kidneys, but low copper levels in other areas can affect the structure of bone, skin, hair, and blood vessels, and interfere with nerve function.
Menkes syndrome is inherited, which means it runs in families. The gene is on the X-chromosome, so if a mother carries the defective gene, each of her sons has a 50% chance of developing the disease and 50% of her daughters will be a carrier.
Menkes syndrome Symptoms
- Bone spurs
- Brittle, kinky hair
- Feeding difficulties
- Lack of muscle tone, floppiness (hypotonia)
- Low body temperature
- Mental deterioration
- Pudgy, rosy cheeks
- Skeletal changes
Tests and Exams
There is often a history of Menkes syndrome in a male relative.
- Abnormal appearance of the hair under the microscope
- Abnormally low body temperature
- Bleeding in the brain
- Slow growth in the womb
In males, all of the hairs will be abnormal. In females who carry this trait, only half of the hairs may be abnormal.
Tests may include:
- Serum ceruloplasmin
- Serum copper level
- Skin cell (fibroblast) culture
- X-ray of the skeleton or x-ray of the skull
Genetic testing may show a change (mutation) in the ATP7A gene.
Treatment of Menkes syndrome
Treatment usually only helps when started very early in the course of the disease. Injections of copper into a vein or under the skin have been used with mixed results.
Most persons with this condition die within the first few years of life.
When to Contact a Health Professional
Talk to your health care provider if you have a family history of Menkes syndrome and you plan to have children. A baby with this condition will often show symptoms early in infancy.
Prevention of Menkes syndrome
See a genetic counselor if you want to have children and you have a family history of Menkes syndrome. Maternal relatives of a boy with this syndrome should be seen by a geneticist to find out if they are carriers.
Bierings M, Clayton P, Houwen RHJ. Disorders in the Transport of Copper, Iron, Magnesium, Manganese, Selenium, and Zinc. In: Saudubray J-M, van den Berghe G, Walter JH, eds. Inborn Metabolic Diseases: Diagnosis and Treatment. 5th ed. New York, NY: Springer; 2012:chap 38.
|Review Date: 5/7/2013
Reviewed By: Chad Haldeman-Englert, MD, FACMG, Wake Forest School of Medicine, Department of Pediatrics, Section on Medical Genetics, Winston-Salem, NC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.