Study of DNA in Blood Samples From Patients With Neuroblastoma

Analysis of Circulating MYCN DNA in Serum Samples Obtained From Patients With Neuroblastoma

This research trial studies is deoxyribonucleic acid (DNA) in blood samples from patients with neuroblastoma. Studying samples of blood from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer. It may also help doctors predict how patients will respond to treatment.

OBJECTIVES:

I. Perform in a blind study a multicentric study by analyzing serum from patients at diagnosis (with a known tumor v-myc avian myelocytomatosis viral oncogene neuroblastoma derived homolog (MYCN) status determined in the Children's Oncology Group [COG] reference lab), in order to confirm our previous data and to define the most appropriate MYCN/control ratio cutoff capable of determining positive and negative cases.

II. Define the limits of the procedure in non-metastatic patients and in those with reduced tumor burden (International Neuroblastoma Staging System [INSS] stage 1 and 2).

OUTLINE:

Circulating DNA is extracted from serum. Polymerase chain reaction (PCR) amplification of MYCN is performed and analyzed by agarose gel electrophoresis. Real-time quantitative PCR is also performed.

Inclusion Criteria:

• Serum samples from neuroblastoma (NB) patients obtained through the COG (and legacy Children's Cancer Group [CCG]/Pediatric Oncology Group [POG] Biology Studies)

  • The MYCN status on corresponding tumors have been determined using standard techniques; the panel of samples must be obtained from NB patients with and without MYCN amplification tumors

• Cases will be drawn from clinical subsets at greatest likelihood to benefit from this testing ability, stage 1 and 2 NBs (both infants and toddlers), stage 4 patients under 18 months of age, and 4S patients