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Living with Glycogen storage disease due to liver phosphorylase kinase deficiency

A mild inherited condition with an enlarged liver, slower growth, and a mild delay in motor skills in childhood.

Understanding Glycogen storage disease due to liver phosphorylase kinase deficiency

Glycogen storage disease due to liver phosphorylase kinase deficiency is a benign inborn error of glycogen metabolism.

It is marked by an enlarged liver, slower growth, and a mild delay in motor development during childhood. It is usually noticed in childhood.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Enlarged liver (hepatomegaly)
  • Slower growth
  • Scarring of the liver (hepatic fibrosis)
  • Mild delay in motor skills

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include digestive system specialists and genetic specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Digestive system specialists (gastroenterologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which gene change is behind my or my child's condition?
How should the liver and growth be monitored?
Does the inheritance type affect other family members?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Recessive, X-Linked

Changes in genes cause this condition. GARD lists both autosomal recessive and X-linked inheritance. It does not name the gene.

GeneticGastrointestinalInherited Metabolic

Also known as: glycogen storage disease type 9a; glycogen storage disease type 9c; glycogen storage disease type ixa; glycogen storage disease type ixc; glycogenosis due to liver phosphorylase kinase deficiency; glycogenosis type 9a

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Glycogen storage disease due to liver phosphorylase kinase deficiencyGARD ID 17261 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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Perspectives from people navigating life with Glycogen storage disease due to liver phosphorylase kinase deficiency.

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