Juvenile Myelomonocytic Leukemia C0349639
A rare blood cancer affecting young children, involving overgrowth of certain white blood cells. Treatment may include chemotherapy and stem cell transplantation.
Key facts at a glance
- ICD-10
- C93.30, C93.31, C93.32
- ICD-11
- 2A00.0
- Body system
- hematologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Frequent infections
Generalized symptoms
(hematologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Fatigue
(hematologic)Pallor
(hematologic)Weight loss
(hematologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Allogeneic stem cell transplantation
Hematopoietic stem cell transplantation from a matched donor is the primary curative treatment option for eligible patients with juvenile myelomonocytic leukemia. This intensive procedure replaces the defective bone marrow with healthy donor cells capable of producing normal blood cells.
Medication management with follow-up
Active treatment with regular monitoring by a healthcare provider is recommended.
Hypomethylating agent therapy
Use of demethylating agents such as azacitidine or decitabine that can induce differentiation of leukemic cells and achieve disease control, particularly in patients who are not immediate candidates for transplant. Treatment involves cyclical administration schedules.
Additional treatment options
Supportive care and transfusion support
Comprehensive supportive management including blood product transfusions, infection prevention and treatment, and management of disease-related complications. This foundational care supports patients through active treatment phases and when curative therapy is not immediately feasible.
medicationDisease burden monitoring through laboratory and molecular assessment
Regular monitoring of hematologic parameters, blast counts, and molecular genetic markers specific to the individual patient's disease. Minimal residual disease monitoring helps guide treatment decisions and early detection of relapse.
monitoringIntegrative supportive therapies
Complementary approaches including nutritional support, stress management techniques, and gentle physical activity to support overall wellbeing during intensive treatment. Acupuncture or massage may help manage treatment-related symptoms when appropriate.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Juvenile Myelomonocytic Leukemia C0349639?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy