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Distinct patterns of copy number alterations may predict poor outcome in central nervous system germ cell tumors
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Distinct patterns of copy number alterations may predict poor outcome in central nervous system germ cell tumors
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Journal Article
Distinct patterns of copy number alterations may predict poor outcome in central nervous system germ cell tumors
2023
Overview
We have previously reported that 12p gain may predict the presence of malignant components and poor prognosis for CNS germ cell tumor (GCT). Recently, 3p25.3 gain was identified as an independent predictor of poor prognosis for testicular GCT. Eighty-one CNS GCTs were analyzed. Copy number was calculated using methylation arrays. Five cases (6.2%) showed 3p25.3 gain, but only among the 40 non-germinomatous GCTs (NGGCTs) (5/40, 12.5%;
p
= 0.03). Among NGGCTs, those with a yolk sac tumor component showed a significantly higher frequency of 3p25.3 gain (18.2%) than those without (1.5%;
p
= 0.048). NGGCTs with gain showed significantly shorter progression-free survival (PFS) than those without (
p
= 0.047). The 3p25.3 gain and 12p gain were independent from each other. The combination of 3p25.3 gain and/or 12p gain was more frequent among NGGCTs with malignant components (69%) than among those without (29%;
p
= 0.02). Germinomas containing a higher number of copy number alterations showed shorter PFS than those with fewer (
p
= 0.03). Taken together, a finding of 3p25.3 gain may be a copy number alteration specific to NGGCTs and in combination with 12p gain could serve as a marker of negative prognosis or treatment resistance. Germinoma with frequent chromosomal instability may constitute an unfavorable subgroup.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
