E74.29
Other disorders of galactose metabolism
Clinical Classification Guidelines
Inclusion Terms
- Galactokinase deficiency
Medical Intelligence & Overview
Other disorders of galactose metabolism, classified under ICD-10 code E74.29, refer to a group of rare genetic conditions that disrupt the body's ability to process galactose, a type of sugar found mainly in milk and dairy products. These disorders stem from deficiencies in enzymes involved in galactose breakdown, most notably galactokinase. When these enzymes are deficient or malfunctioning, it leads to the accumulation of galactose and its byproducts in the body, which can cause various health problems if untreated. Although these conditions are rare, understanding their nature helps in early detection and management to prevent long-term complications.
Causes & Symptoms
Clinical Causes: Genetic mutations inherited in an autosomal recessive pattern Deficiency of the enzyme galactokinase, which is crucial for converting galactose into galactose-1-phosphate Mutations affecting other components of the galactose metabolism pathway, such as galactose-1-phosphate uridyltransferase or uridine diphosphate galactose-4'-epimerase (less common in E74.29)
Key Symptoms: Early onset of cataracts, often noticeable within the first few months of life Lack of significant symptoms related to liver or neurodevelopmental issues, which are more common in other types of galactose metabolism disorders Failure to thrive or poor weight gain in infants Vomiting or diarrhea after consuming dairy products Possible mild intellectual disability if untreated over long periods
Diagnostic & Treatment
Diagnosis Path: Measuring galactose levels in blood and urine samples, which are typically elevated Enzymatic assays to determine galactokinase activity in red blood cells or other tissues Genetic testing to identify mutations in the GALK1 gene, responsible for encoding galactokinase Newborn screening programs in some regions may detect elevated galactose or related metabolites
Treatment Protocols: Elimination of galactose from the diet by avoiding all dairy products and foods containing lactose Use of specialized formulas for infants that are free of lactose and galactose Regular ophthalmologic examinations to monitor and manage the development of cataracts Monitoring of galactose and metabolite levels to assess disease control Supportive therapies for neurodevelopmental issues, if present
Clinical Advice & FAQs
Billing Guidance
Is E74.29 a billable ICD-10 code?
Yes, E74.29 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E74.29?
Clinical documentation must specify the nature of Other disorders of galactose metabolism and any associated comorbidities for accurate reporting.
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