Molecular insights into malignant progression of atypical choroid plexus papilloma

Maxim Yankelevich, Jonathan L. Finlay, Hamza Gorsi, William Kupsky, Daniel R. Boue, Carl J. Koschmann, Chandan Kumar-Sinha, Rajen Mody

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Choroid plexus tumors are rare pediatric neoplasms ranging from low-grade papillomas to overtly malignant carcinomas. They are commonly associated with Li-Fraumeni syndrome and germline TP53 mutations. Choroid plexus carcinomas associated with Li-Fraumeni syndrome are less responsive to chemotherapy, and there is a need to avoid radiation therapy leading to poorer outcomes and survival. Malignant progression from choroid plexus papillomas to carcinomas is exceedingly rare with only a handful of cases reported, and the molecular mechanisms of this progression remain elusive. We report a case of malignant transformation of choroid plexus papilloma to carcinoma in a 7-yr-old male with a germline TP53 mutation in which we present an analysis of molecular changes that might have led to the progression based on the next-generation genetic sequencing of both the original choroid plexus papilloma and the subsequent choroid plexus carcinoma. Chromosomal aneuploidy was significant in both lesions with mostly gains present in the papilloma and additional significant losses in the carcinoma. The chromosomal loss that occurred, in particular loss of Chromosome 13, resulted in the losses of two critical tumor suppressor genes, RB1 and BRCA2, which might play a possible role in the observed malignant transformation.

Original languageEnglish
Article numbera005272
JournalCold Spring Harbor Molecular Case Studies
Volume7
Issue number1
DOIs
StatePublished - Feb 2021

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