E70.330
Chediak-Higashi syndrome
Clinical Classification Guidelines
Medical Intelligence & Overview
Chediak-Higashi syndrome is a rare genetic disorder that affects multiple bodily systems. It is characterized by problems with the immune system, abnormal skin and hair pigmentation, and neurological complications. The condition is caused by mutations in specific genes that impair normal cell function, particularly affecting immune cells, which results in increased susceptibility to infections. Due to its complex presentation, early diagnosis and management are vital to improving quality of life for those affected.
Causes & Symptoms
Clinical Causes: Mutations in the LYST (神経史) gene, which controls the size and function of lysosomes within cells. Inheritance pattern is autosomal recessive, meaning a person must inherit two copies of the mutated gene to develop the syndrome. Carriers, with only one mutated gene, usually do not show symptoms but can pass the gene to their children.
Key Symptoms: Partial or complete albinism leading to light-colored hair, skin, and eyes Frequent, persistent bacterial, viral, and fungal infections due to immune system deficiencies Large, granulated lymphocytes visible under the microscope, indicating abnormal immune cells Neurological issues, such as developmental delays, peripheral neuropathy, or speech and motor difficulties Bleeding tendencies caused by platelet abnormalities Eye problems, including nystagmus (rapid eye movements) and problems with visual acuity
Diagnostic & Treatment
Diagnosis Path: Clinical examination revealing characteristic features like albinism and recurrent infections Microscopic analysis of blood smears showing large, granulated lymphocytes Genetic testing to identify mutations in the LYST gene Assessment of immune system function through laboratory tests for immune cell activity Bone marrow examination may be performed if blood cell abnormalities are observed
Treatment Protocols: Aggressive infection control with antibiotics, antifungals, and antivirals Hematopoietic stem cell transplantation (bone marrow transplant) may be considered in selected cases to restore immune function Supportive therapies include physical therapy, speech therapy, and neurological support as needed Monitoring for and managing bleeding or clotting issues Regular follow-up with a multidisciplinary team to address ongoing health needs
Clinical Advice & FAQs
Billing Guidance
Is E70.330 a billable ICD-10 code?
Yes, E70.330 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report E70.330?
Clinical documentation must specify the nature of Chediak-Higashi syndrome and any associated comorbidities for accurate reporting.
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