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Juvenile Myelomonocytic Leukemia is a rare, aggressive blood cancer that affects young children. It is characterized by the uncontrolled production of abnormal white blood cells (monocytes and granulocytes) in the bone marrow.
read more about juvenile myelomonocytic leukemia ...The cause is often linked to a mutation in specific genes (like the PTPN11 gene) that control cell growth and signaling. This defect causes the abnormal cells to grow uncontrollably, crowding out the healthy blood cells in the bone marrow and liver. The disorder is classified as a myelodysplastic syndrome/myeloproliferative disorder. The rapid proliferation of abnormal white cells is the defining feature that drives the disease's severity.
Symptoms include persistent fever, unexplained fatigue, pale skin (anemia), and easy bruising. A distinct symptom is a large, swollen abdomen caused by the severe enlargement of the liver and spleen (hepatosplenomegaly). This enlargement is due to the buildup of abnormal white cells outside the bone marrow. Frequent infections due to poor immune function are also common.
Juvenile Myelomonocytic Leukemia can impact eye health if the cancerous cells infiltrate the orbit or retina. Infiltration can cause a mass behind the eye, leading to proptosis (bulging of the eye) or severe swelling. The cancer can also cause retinal hemorrhages (bleeding) due to low platelet counts, requiring careful ophthalmic monitoring.
Diagnosis involves blood tests that show a high white blood cell count and an increased number of monocytes. A bone marrow biopsy is necessary to confirm the disease and identify specific genetic mutations. Genetic testing is central to determining the most appropriate course of therapy.
The necessary treatment is typically a hematopoietic stem cell transplant (bone marrow transplant). This procedure replaces the cancerous bone marrow with healthy cells from a donor and is the only known cure for this aggressive disorder. Chemotherapy may be used temporarily to reduce cell counts.
Yes, a successful bone marrow transplant is the only known cure.
Yes, JMML is highly aggressive and requires immediate, intensive treatment.
No, but JMML is diagnosed in boys slightly more often than in girls.
Seek a hematology consult if an infant has a persistent cough, fever, and an enlarged abdomen. JMML is a rare childhood cancer. Children with "Neurofibromatosis Type 1" are at a significantly higher risk for this disease.
Seek a hematology consult if an infant has a persistent cough, fever, and an enlarged abdomen. JMML is a rare childhood cancer. Children with "Neurofibromatosis Type 1" are at a significantly higher risk for this disease.