Segmental Chromosomal Aberrations in Localized Neuroblastoma Can be Detected in Formalin-Fixed Paraffin-Embedded Tissue Samples and Are Associated With Recurrence

Navin Pinto, Jodi R. Mayfield, Gordana Raca, Mark A. Applebaum, Alexandre Chlenski, Madina Sukhanova, Rochelle Bagatell, Meredith S. Irwin, Anthony Little, Jawhar Rawwas, Yasmin C Gosiengfiao, Olivier Delattre, Isabelle Janoueix-Lerosey, Eve Lapouble, Gudrun Schleiermacher, Susan L. Cohn

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

BACKGROUND: Array comparative genomic hybridization (CGH) analyses of frozen tumors have shown strong associations between the pattern of chromosomal aberrations and outcome in patients with advanced-stage neuroblastoma. New platforms for analyzing chromosomal aberrations using formalin-fixed paraffin-embedded (FFPE) tissue have recently been developed. We sought to determine whether chromosomal microarray analysis (CMA) using FFPE tumors is feasible and if segmental chromosomal aberrations were prognostic of recurrence in localized neuroblastoma.

METHODS: Patients with MYCN nonamplified International Neuroblastoma Staging System stage 1 and 2 disease who recurred were identified. CMA was performed with diagnostic FFPE samples using OncoScan™ FFPE Express 2.0. The prognostic significance of chromosomal pattern was validated in 105 patients with available CGH results.

RESULTS: In 26 evaluable patients, 11 recurred locally, nine had metastatic relapse, and six remained progression free >3 years from diagnosis. No chromosomal aberrations were identified in four tumors. Numerical chromosomal aberrations (NCAs) without segmental chromosomal aberration (SCA) were identified in 11 patients: six progressed locally, two had metastatic progression and 3 remained progression-free. Eleven patients had SCAs: four progressed locally, six developed metastatic progression and one remained progression-free. Five or more SCAs were only detected in tumors from patients who developed metastases (P = 0.0004). In the validation cohort, SCAs were associated with inferior event-free survival (EFS) compared to NCA (5-year EFS 68% ± 8.3% vs. 91% ± 3.6%, respectively; P = 0.0083).

CONCLUSIONS: It is feasible to evaluate chromosomal aberrations using FFPE neuroblastoma tissue. SCA is associated with inferior EFS in localized neuroblastoma patients, and multiple SCAs may be predictive of metastatic relapse.

Original languageEnglish (US)
Pages (from-to)1019-1023
Number of pages5
JournalPediatric blood & cancer
Volume63
Issue number6
DOIs
StatePublished - Jun 1 2016

Keywords

  • low-risk neuroblastoma
  • metastatic relapse
  • segmental chromosomal aberrations

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Hematology
  • Oncology

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