What is the definition of Krabbe Disease?

Krabbe disease is a rare genetic disorder of the nervous system. It is a type of brain disease called leukodystrophy.

What are the alternative names for Krabbe Disease?

Globoid cell leukodystrophy; Galactosylcerebrosidase deficiency; Galactosylceramidase deficiency

What are the causes for Krabbe Disease?

A defect in the GALC gene causes Krabbe disease. People with this gene defect do not make enough of a substance (enzyme) called galactocerebroside beta-galactosidase (galactosylceramidase).

The body needs this enzyme to make myelin. Myelin surrounds and protects nerve fibers. Without this enzyme, myelin breaks down, brain cells die, and nerves in the brain and other body areas do not work properly.

Krabbe disease can develop at various ages:

  • Early-onset Krabbe disease appears in the first months of life. Most children with this form of the disease die before they reach age 2.
  • Late-onset Krabbe disease begins in late childhood or early adolescence.

Krabbe disease is inherited, which means it is passed down through families. If both parents carry the nonworking copy of the gene related to this condition, each of their children has a 25% (1 in 4) chance of developing the disease. It is an autosomal recessive disorder.

This condition is very rare. It is most common among people of Scandinavian descent.

What are the symptoms for Krabbe Disease?

Symptoms of early-onset Krabbe disease are:

  • Changing muscle tone from floppy to rigid
  • Hearing loss that leads to deafness
  • Failure to thrive
  • Feeding difficulties
  • Irritability and sensitivity to loud sounds
  • Severe seizures (may begin at a very early age)
  • Unexplained fevers
  • Vision loss that leads to blindness
  • Vomiting

With late onset Krabbe disease, vision problems may appear first, followed by walking difficulties and rigid muscles. Symptoms vary from person to person. Other symptoms may also occur.

What are the current treatments for Krabbe Disease?

There is no specific treatment for Krabbe disease.

Some people have had a bone marrow transplant in the early stages of the disease, but this treatment has risks.

What are the support groups for Krabbe Disease?

More information and support for people with Krabbe disease and their families can be found at:

  • National Organization for Rare Disorders -- rarediseases.org/rare-diseases/leukodystrophy-krabbes/s
  • NIH Genetic and Rare Diseases Information Center -- rarediseases.info.nih.gov/diseases/6844/krabbe-disease
  • United Leukodystrophy Foundation -- ulf.org/

What is the outlook (prognosis) for Krabbe Disease?

The outcome is likely to be poor. On average, infants with early-onset Krabbe disease die before age 2. People who develop the disease at a later age have survived into adulthood with nervous system disease.

What are the possible complications for Krabbe Disease?

This disease damages the central nervous system. It can cause:

  • Blindness
  • Deafness
  • Severe problems with muscle tone

The disease is usually life-threatening.

When should I contact a medical professional for Krabbe Disease?

Contact your provider if your child develops symptoms of this disorder. Go to the hospital emergency room or call 911 or the local emergency number if the following symptoms occur:

  • Seizures
  • Loss of consciousness
  • Abnormal posturing

How do I prevent Krabbe Disease?

Genetic counseling is recommended for people with a family history of Krabbe disease who are considering having children.

A blood test can be done to see if you carry the gene for Krabbe disease.

Prenatal tests (amniocentesis or chorionic villus sampling) can be done to test a developing baby for this condition.

REFERENCES

Katirji B. Disorders of peripheral nerves. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. Bradley and Daroff's Neurology in Clinical Practice. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 106.

Kwon JM. Neurodegenerative disorders of childhood. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 617.

Pastores GM, Wang RY. Lysosomal storage diseases. In: Swaiman KF, Ashwal S, Ferriero DM, et al, eds. Swaiman's Pediatric Neurology: Principles and Practice. 6th ed. Philadelphia, PA: Elsevier; 2017:chap 41.