Loss of Heterozygosity at Chromosome 16q Is a Negative Prognostic Factorin Korean Pediatric Patients with Favorable Histology Wilms Tumor:A Report of the Korean Pediatric Hematology Oncology Group (K-PHOG)
- Author:
Jun Eun PARK
1
;
O Kyu NOH
;
Yonghee LEE
;
Hyoung Soo CHOI
;
Jung Woo HAN
;
Seung Min HAHN
;
Chuhl Joo LYU
;
Ji Won LEE
;
Keon Hee YOO
;
Hong Hoe KOO
;
Seon-Yong JEONG
;
Ki Woong SUNG
Author Information
- Publication Type:Original Article
- From:Cancer Research and Treatment 2020;52(2):438-445
- CountryRepublic of Korea
- Language:0
-
Abstract:
Purpose:Loss of heterozygosity (LOH) at chromosomes 1p and 16q is a poor prognostic factor infavorable histology Wilms tumor (FHWT). This study investigated the prevalence of LOH at1p and 16q and evaluated its prognostic value in Korean children with FHWT.
Materials and Methods:We analyzed 101 FHWT patients who were diagnosed between 1996 and 2016 in KoreanSociety of Pediatric Hematology Oncology Group hospitals. Using paraffin-embedded kidneytissue samples sent from each center, we reviewed LOH at 1p and 16q in each patient andassessed the prognostic value of LOH status for clinical parameters affecting event-freesurvival (EFS).
Results:Of the 101 patients, 12 (11.9%) experienced recurrence; the 3-year EFS was 87.6%. LOHat 1p or 16q was detected in 19 patients (18.8%), with five having LOH at both 1q and 16q.The frequency of LOH at 1p was higher among younger patients (p=0.049), but there wasno difference in LOH prevalence according to tumor stage. In the multivariate analysis, LOHat 16q was a significant negative prognostic factor affecting EFS (3-year EFS, 73.7% vs.91.1%; hazard ratio, 3.95; p=0.037), whereas LOH at 1p was not (p=0.786).
Conclusion:LOH at 16q was a significant negative prognostic factor affecting outcome in Korean pediatricFHWT patients. Due to the small sample size of this study, large-scale multicenter trialsare warranted to investigate the prognostic value of LOH at 1p and 16q in Korean childrenwith FHWT.
