# Treatment methods for childhood cancer: neuroblastoma
The treatment of neuroblastoma is strongly dependent on the stage at which the disease is detected, the biological characteristics of the tumor, and the risk profile. Because neuroblastoma is a highly heterogeneous condition, the approach varies considerably from patient to patient. Below are the treatment methods applied at different stages.
Surgery
Surgery to remove as much of the tumor as possible is a cornerstone of neuroblastoma treatment, especially when detected early. The aim is to remove as much tumor tissue from the body as possible without unnecessarily damaging vital organs.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Surgery can be performed at different stages. With a small, localized neuroblastoma, surgery alone may be sufficient. With extensive tumors, chemotherapy is used beforehand to shrink the tumor, followed by a second surgery. The procedure can be more complex if the tumor is adjacent to important blood vessels or nerves. Possible side effects depend on where in the body surgery is performed, but can include infection, bleeding, and damage to surrounding structures.
Chemotherapy
Chemotherapy is essential for higher-risk neuroblastomas. A combination of multiple cytostatic agents is used because this is more effective than a single agent alone.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Standard chemotherapy for neuroblastoma usually uses combinations of agents such as vincristine, cisplatin, etoposide, and doxorubicin. These substances work by disrupting DNA synthesis in tumor cells or stopping cells from dividing, causing them to die. Side effects of chemotherapy are broad and can include fatigue, nausea, vomiting, hair loss, increased susceptibility to infection due to low white blood cell counts, and neuropathy (nerve pain in hands and feet). Some agents can have longer-term effects on heart or kidney function. Treatment usually proceeds in cycles, with rest periods in between.
High-dose chemotherapy with stem cell transplantation (HDCT-ASCT)
This intensive approach is used for high-risk neuroblastomas, usually after initial chemotherapy.
ProveniIncluded in official guidelines, or approved by EMA or FDA
The patient receives very high doses of chemotherapy – much higher than would normally be possible – to address all tumor cells. However, this also destroys the bone marrow, so stem cells are harvested from the blood or bone marrow beforehand. After high-dose treatment, these stem cells are reinfused to restore the bone marrow. The side effects of this procedure are substantial: severe susceptibility to infection, bleeding, digestive problems, organ fatigue, and in the worst case, permanent organ damage. This is an intensive treatment performed in specialized centers and requires hospitalization for several weeks.
Immunotherapy with monoclonal antibodies
In recent years, immunotherapy targeting tumor characteristics has become available for neuroblastoma.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Dinutuximab (Unitig) is a monoclonal antibody against GD2, a protein commonly found on neuroblastoma cells. It works by prompting the immune system to attack cells carrying this protein. This agent is given after high-dose chemotherapy and stem cell transplantation, often in combination with interleukin-2 (an immune-stimulating agent). Known side effects include pain (sometimes severe), fever, allergic reactions, and immune-related side effects.
ResearchediPositive results in clinical studies, not yet standard treatment
Immunotherapy with checkpoint inhibitors (anti-PD-1/PD-L1 agents) and natural killer cells in combination with other agents is being investigated as a supplement, especially for recurrent or resistant tumors. This approach is based on the idea that the immune system can be better 'awakened' to attack the tumor itself.
Radiotherapy
Radiation is selectively used in certain patients.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Radiotherapy targets tumors that cannot be completely removed surgically or areas with high recurrence risk. This can be external radiation (from outside) or radioidine therapy (where radioactive iodine is delivered via infusion into the body, particularly effective because neuroblastoma cells take up iodine). Side effects of external radiotherapy include skin reactions, fatigue, and in the long term, risk of secondary cancers in irradiated areas.
Supportive Treatment
Support is not direct cancer treatment, but essential for sustaining treatment.
ProveniIncluded in official guidelines, or approved by EMA or FDA
Patients receive antibiotics for infection prophylaxis, anti-emetics, blood transfusions and growth factors (G-CSF) to help the bone marrow recover faster after chemotherapy. This significantly reduces infection risks and side effects.
Targeted therapy (targeting specific genetic abnormalities)
Research into medicines that act on certain genetic mutations in neuroblastoma tumors is underway.
ResearchediPositive results in clinical studies, not yet standard treatment
For neuroblastomas with NTRK activation (neurotrophic tyrosine kinase receptor), NTRK inhibitors are being investigated. Tumors with ALK mutations may be sensitive to ALK inhibitors. TrkB inhibitors are being studied because TrkB is involved in growth of certain neuroblastoma tumors. These targeted approaches have the advantage of being able to act more specifically against tumor cells and possibly having fewer side effects on normal cells, but they are mostly still in clinical trial phase.
Treatment of complications
A specific complication is opsoclonus-myoclonus-ataxia syndrome (OMAS), a rare neurological condition caused by immune reactions against the neuroblastoma.
ProveniIncluded in official guidelines, or approved by EMA or FDA
OMAS can be treated with intravenous immunoglobulin (IVIG, antibodies from healthy donors) and intensive chemotherapy with stem cell transplantation. Corticosteroids are also used to control the immune reaction.
New in research
Recent studies focus on better imaging (PET tracers with greater specificity for neuroblastoma tissue) and optimization of chemotherapy combinations. Researchers are also looking at 3D culture models of tumors to more quickly determine which therapies are effective for an individual patient.
ExperimentaliOngoing in study setting, outcome still unknown
Nanoparticle formulations of known chemotherapies, for example topotecan in nanoparticle form, are being investigated to deliver medicines more effectively into tumors. Combining multiple immunotherapies at once is also in study phase.
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_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._