C91.4
Hairy cell leukemia
Clinical Classification Guidelines
Inclusion Terms
- Leukemic reticuloendotheliosis
Medical Intelligence & Overview
Hairy Cell Leukemia is a rare form of chronic leukemia characterized by the uncontrolled growth of abnormal B lymphocytes, a type of white blood cell. Named for the hair-like projections on the surface of the cancer cells, this disease primarily affects middle-aged and older adults. It is classified under leukemic reticuloendotheliosis, a group of slow-growing blood cancers that originate in the lymphatic system. While it is a rare condition, understanding its features can help in early recognition and management.
Causes & Symptoms
Clinical Causes: Genetic mutations affecting B lymphocytes Potential environmental exposures, though specific risk factors are not well established No clear inheritance pattern identified Exposure to certain chemicals or radiation may contribute, but evidence is limited
Key Symptoms: Persistent fatigue or tiredness Unexplained weight loss Swollen lymph nodes, especially in the neck, armpits, or groin Frequent infections or recurrent illness Abdominal discomfort or fullness due to enlarged spleen Easy bruising or bleeding tendencies Fever or night sweats without an apparent infection Skin infections or unusually frequent infections
Diagnostic & Treatment
Diagnosis Path: The diagnosis of Hairy Cell Leukemia involves a combination of blood tests, bone marrow examination, and imaging studies. Blood counts often reveal anemia, low platelet, and white cell counts. A peripheral blood smear can show the characteristic hairy-looking lymphocytes. Bone marrow aspiration and biopsy provide definitive evidence, revealing abnormal B lymphocytes with hair-like projections. Flow cytometry and immunophenotyping are used to confirm the diagnosis by identifying specific cell surface markers. Additional imaging such as ultrasound may be employed to assess spleen size.
Treatment Protocols: Treatment strategies aim to control symptoms and manage disease progression. Common options include:
Clinical Advice & FAQs
Billing Guidance
Is C91.4 a billable ICD-10 code?
Yes, C91.4 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report C91.4?
Clinical documentation must specify the nature of Hairy cell leukemia and any associated comorbidities for accurate reporting.
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