Q44.71
Alagille syndrome
Clinical Classification Guidelines
Inclusion Terms
- Alagille-Watson syndrome
Medical Intelligence & Overview
Alagille syndrome, also known as Alagille-Watson syndrome, is a complex genetic disorder that affects multiple parts of the body. It primarily involves liver problems, but can also impact the heart, eyes, face, and skeleton. This condition is inherited in an autosomal dominant pattern and can vary significantly in severity among those affected. Recognized by its distinctive features and associated health issues, Alagille syndrome requires coordinated medical care for management. Understanding its causes, symptoms, and diagnostic procedures can help provide insight into this rare genetic condition.
Causes & Symptoms
Clinical Causes: Mutations in the JAG1 gene located on chromosome 20 are the most common cause. Less frequently, mutations in the NOTCH2 gene can be responsible. These genetic alterations disrupt normal signaling pathways critical for the development of the liver, heart, and other organs. Alagille syndrome is inherited in an autosomal dominant manner, meaning a single copy of the mutated gene from an affected parent can cause the disorder. Approximately 30-50% of cases result from new (de novo) mutations, with no family history.
Key Symptoms: Jaundice (yellowing of the skin and eyes) due to liver problems Poor growth or failure to thrive in infants Fibrosis or scarring of the liver congenital heart defects, often with a characteristic heart murmur Distinctive facial features, including a broad forehead, deep-set eyes, a straight nose, and a small chin Eye abnormalities such as posterior embryotoxon (an eye defect visible during eye exams) Skeletal anomalies like butterfly-shaped vertebrae Overlapping symptoms can vary, and some individuals may experience additional issues such as kidney problems or vascular anomalies
Diagnostic & Treatment
Diagnosis Path: Detailed medical and family history assessment Physical examination focusing on characteristic facial features and other physical signs Liver function tests to assess the extent of liver damage Imaging studies such as ultrasound or MRI to evaluate liver and skeletal anomalies Echocardiography to identify heart defects Genetic testing to detect mutations in JAG1 or NOTCH2 genes Eye examinations to identify posterior embryotoxon or other ocular abnormalities
Treatment Protocols: Nutritional support to promote growth, including specialized diets or supplements Medications to improve liver function and manage itching associated with cholestasis Surgical interventions or procedures for correcting heart defects Regular monitoring of liver health and screening for associated complications Supportive therapies such as physical therapy for skeletal issues Ongoing multidisciplinary care involving hepatologists, cardiologists, Ophthalmologists, and other specialists
Clinical Advice & FAQs
Billing Guidance
Is Q44.71 a billable ICD-10 code?
Yes, Q44.71 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report Q44.71?
Clinical documentation must specify the nature of Alagille syndrome and any associated comorbidities for accurate reporting.
Cite this Clinical Reference