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Leukoencephalopathy with brainstem and spinal cord involvement and lactate elevation (LBSL)

Description

Leukoencephalopathy with brainstem and spinal cord involvement and lactate elevation (commonly referred to as LBSL) is a progressive disorder that affects the brain and spinal cord. Leukoencephalopathy refers to abnormalities in the white matter of the brain, which is tissue containing nerve cell fibers (axons) that transmit nerve impulses.

LBSL is a rare genetic disorder that affects the brain and spinal cord. The exact number of people with this condition is unknown, and many may go undiagnosed, but based on reported cases, there are approximately 100 known patients worldwide.

Most affected individuals begin to develop movement problems during childhood or adolescence. However, in some individuals, these problems do not develop until adulthood. Symptoms include:

  • Abnormal muscle stiffness (spasticity) and difficulty with coordinating movements (ataxia).
  • Loss of the ability to sense the position of their limbs or vibrations with their limbs, and as a result most affected individuals eventually require wheelchair assistance, sometimes as early as their teens, although the age varies.
  • Some affected individuals develop recurrent seizures (epilepsy), speech difficulties (dysarthria), learning problems, or mild deterioration of mental functioning.
  • Some people with this disorder are particularly vulnerable to severe complications following minor head trauma, which may trigger a loss of consciousness, other reversible neurological problems, or fever.

Diagnosis

LBSL is diagnosed on the basis of the clinical symptoms in combination with specific MRI and magnetic resonance spectroscopy (MRS) findings. Genetic testing is required to identify the DARS2 genetic mutation and confirm diagnosis. LBSL is inherited in an autosomal recessive manner, meaning most patients have inherited two copies of the mutated gene – one from each parent. Parents who are both carries of the DARS2 mutation have a 25% chance of having a child with LBSL.

Treatment

There is currently no curative treatment for LBSL. Treatment for LBSL is directed at the symptoms as they arise and includes supportive therapies like physical therapy and rehabilitation to improve motor function, speech therapy and drugs to prevent seizures.  Research to develop new drug therapies are ongoing at the Moser Center for Leukodystrophies. 

LBSL Conference

About the Conference:

Kennedy Krieger Institute, one of the world’s premier neurogenetic research and treatment facilities, and the nonprofit patient advocacy organization “A Cure for Ellie” are teaming up to host the conference specifically for patients and doctors interested in or affected by LBSL (leukoencephalopathy with brain stem and spinal cord involvement with lactate elevation). This two-day event will present information to help those living with LBSL manage their condition. We will bring together patients and families from around the globe to learn from one another and to hear from some of the world’s top doctors and scientists specializing in leukodystrophies.

For more information, visit the LBSL Conference page.

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