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What is metachromatic leukodystrophy (MLD)?

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It’s one type of lysosomal storage disorder, which happens when you’re missing important enzymes that help your body break down proteins, carbs, and other substances. MLD happens when you lack the enzyme arylsulfatase A. It normally breaks down a group of fats called sulfatides. Without the enzyme, these fats build up and destroy the protective coating that lets nerves communicate.

MLD comes in different forms. Symptoms can include:

  • Loss of feeling in the hands and feet
  • Seizures
  • Trouble walking and talking
  • Vision and hearing loss

From: What Are Lysosomal Storage Disorders? WebMD Medical Reference

SOURCES: MLD Foundation: "What is MLD?"

Mount Sinai Hospital: "Lysosomal Storage Disease."

National Fabry Disease Foundation: "Symptoms Overview." "What Is Fabry Disease?"

National Gaucher Foundation: "Symptoms of Gaucher Disease." "What Is Gaucher Disease?"

National Human Genome Research Institute: "Learning About Gaucher Disease." "Learning About Tay-Sachs Disease."

National MPS Society: "MPS Diseases."

National Niemann-Pick Disease Foundation, Inc.: "Niemann-Pick Disease Overview."

National Organization for Rare Disorders: "Lysosomal Storage Disorders."

"Mucopolysaccharidoses." "Pompe Disease."

National Tay-Sachs & Allied Diseases Association: "Lysosomal Storage Diseases."

United Leukodystrophy Foundation: "Krabbe Disease."

National Tay-Sachs & Allied Diseases Association of Delaware Valley: "Tay-Sachs Disease."

U.S. National Library of Medicine: "Krabbe Disease." "Metachromatic leukodystrophy." "Pompe Disease." "Tay-Sachs Disease."

Elmhurst College, “Role of Enzymes in Biochemical Reactions.”

Reviewed by Dan Brennan on October 17, 2018

SOURCES: MLD Foundation: "What is MLD?"

Mount Sinai Hospital: "Lysosomal Storage Disease."

National Fabry Disease Foundation: "Symptoms Overview." "What Is Fabry Disease?"

National Gaucher Foundation: "Symptoms of Gaucher Disease." "What Is Gaucher Disease?"

National Human Genome Research Institute: "Learning About Gaucher Disease." "Learning About Tay-Sachs Disease."

National MPS Society: "MPS Diseases."

National Niemann-Pick Disease Foundation, Inc.: "Niemann-Pick Disease Overview."

National Organization for Rare Disorders: "Lysosomal Storage Disorders."

"Mucopolysaccharidoses." "Pompe Disease."

National Tay-Sachs & Allied Diseases Association: "Lysosomal Storage Diseases."

United Leukodystrophy Foundation: "Krabbe Disease."

National Tay-Sachs & Allied Diseases Association of Delaware Valley: "Tay-Sachs Disease."

U.S. National Library of Medicine: "Krabbe Disease." "Metachromatic leukodystrophy." "Pompe Disease." "Tay-Sachs Disease."

Elmhurst College, “Role of Enzymes in Biochemical Reactions.”

Reviewed by Dan Brennan on October 17, 2018

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What is mucopolysaccharidosis (MPS)?

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