Presence of 1q gain and absence of 7p gain are new predictors of local or metatastic relapse in localized resectable neuroblastoma.
Neuro Oncol. 2008 Oct 15;
Authors: Pezzolo A, Rossi E, Gimelli S, Parodi F, Negri F, Conte M, Pistorio A, Sementa A, Pistoia V, Zuffardi O, Gambini C
We have addressed the search of novel genetic prognostic markers in a selected cohort of patients with localized resectable neuroblastoma (NB), stroma poor, who underwent relapse or progression (group 1) or complete remission (group 2) over a minimum follow-up of 32 months from diagnosis. Twenty three Italian patients with localized resectable NB (stages 1 and 2) diagnosed from 1994 to 2005 were studied. All patients received surgical treatment. Chemotherapy was administered only to the three stage 2 patients who had MYCN amplified tumors. High-resolution array-comparative genomic hybridization (CGH) DNA copy-number analysis technology was used in order to identify novel prognostic markers. Chromosome 1p36.22p36.32 loss and 1q22qter gain, detected almost exclusively in group 1 patients, were significantly associated with poor event-free survival (EFS) (P = 0.0024 and P = 0.024, respectively). In contrast, patients with 7p11.2p22 gain, who belonged predominantly to group 2, had a significantly better EFS (P = 0.015). The frequency of 17q gain or 3 and 11q losses did not differ significantly in group 1 vs group 2 NBs. The sensitive technique used allowed us to define the smallest region of 1p deletion. In conclusion, 1q22qter gain and 7p11.2p22 gain might represent new prognostic markers in localized resectable NB, but the small study size and the retrospective nature of the findings warrant further validation of the results obtained in larger studies.
PMID: 18923191 [PubMed - as supplied by publisher]