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Pediatric_Oncology_A_Comprehensive_Guide.pdf
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122

P. Imbach

 

 

Radical tumor resection should occur at some point during therapy; can be after chemotherapy and/or radiotherapy

Stage IVS (seen in patients less than 12–18 months of age): high cure rate of 85–92% after staging and eventually tumor resection without chemotherapy and/ or radiotherapy; infants with NMYC amplification have a worse prognosis than those without NMYC-amplified tumors, but not as poor a prognosis as patients greater than 1 year of age with NMYC-amplified tumors (see below)

In rapid progressive hepatomegaly accompanied with dyspnea, initial chemotherapy and eventually low-dose irradiation of the liver (1.5–6 Gy) may be helpful

In children with intraspinal compression, chemotherapy alone and/or neurosurgical intervention with laminectomy have been effective

10.12.4.2 Intermediateand High-Risk Group

Stage II: 1–21 years of age, NMYC amplification; unfavorable histology

Stages III, IV, IVS: 0–21 years of age, NMYC amplification; or: 1–21 years of age, unfavorable histology (without NMYC amplification)

Mostly good response to induction chemotherapy (see above)

Persistent bone and/or bone marrow involvement is prognostically unfavorable

Induction phase: chemotherapy followed by eventual residual tumor resection, followed by maintenance chemotherapy and/or radiotherapy

Persistent neuroblastoma:

High-dose chemotherapy with autologous stem cell support

Allogeneic stem cell transplantation with the objective of graft-versus-tumor effect is still experimental

Treatment of minimal residual disease (MRD) provided by MIBG imaging [see “Methylisobenzyl Guanidinium (MIBG) Scintigraphy”, above]; retinoids for induction of neuroblast differentiation; specific monoclonal antibody against neuroblastoma cell antigen (3F8, GD2a)

MIBG-therapy can result in significant responses in patients with refractory disease, but is limited by toxicities such as myelosuppression

10.12.5Therapy in Relapse

For curative or palliative treatment: topotecan, paclitaxel (Taxol), irinotecan, or etoposide

Radiolabeled MIBG therapy

10.13Prognosis

In general, the following prognostic factors are clinically relevant: stage, age, histology, differentiation, NMYC amplification, 11q aberrations, and chromosomal ploidy.

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