E74.03
Cori disease
Clinical Classification Guidelines
Inclusion Terms
- Forbes disease
- Type III glycogen storage disease
Medical Intelligence & Overview
Cori disease, also known as Forbes disease or Type III glycogen storage disease, is a hereditary disorder that affects how the body stores and uses glycogen, a form of stored sugar. This condition impacts the liver and muscles, leading to issues with energy production and overall metabolic stability. Typically diagnosed in infancy or childhood, Cori disease can vary in severity, but with appropriate management, many individuals maintain a good quality of life.
Causes & Symptoms
Clinical Causes: Genetic mutation in the AGL gene, inherited in an autosomal recessive pattern Inheriting defective copies of the gene from both parents Disruption in the enzyme amylo-1,6-glucosidase (debranching enzyme) activity, impairing glycogen breakdown
Key Symptoms: Muscle weakness and fatigue, particularly during physical activity Growth delays or failure to thrive in infants and children Hepatomegaly (enlarged liver) due to abnormal glycogen accumulation Hypoglycemia (low blood sugar levels) during fasting or illness Muscle pain and cramping Delayed motor development in some cases Thin or short stature in some individuals Potential accumulation of abnormal glycogen with characteristic short outer branches
Diagnostic & Treatment
Diagnosis Path: Diagnosis of Cori disease involves a combination of clinical evaluation and laboratory tests, such as blood glucose levels, liver function tests, and genetic testing. A definitive diagnosis often requires enzyme activity assays from liver or muscle tissue biopsies, revealing reduced or absent activity of the debranching enzyme. Imaging studies like ultrasound may detect hepatomegaly, while genetic testing confirms mutations in the AGL gene.
Treatment Protocols: While there is no cure for Cori disease, management focuses on controlling symptoms and preventing complications. Dietary modifications are critical, including frequent carbohydrate-rich meals and cornstarch therapy to maintain blood sugar levels. Regular monitoring by healthcare professionals is essential to ensure optimal growth and metabolic control. Physical therapy might help improve muscle strength, and ongoing medical evaluations are necessary to address any emerging issues.
Clinical Advice & FAQs
Billing Guidance
Is E74.03 a billable ICD-10 code?
Yes, E74.03 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E74.03?
Clinical documentation must specify the nature of Cori disease and any associated comorbidities for accurate reporting.
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