Germline mutation and aberrant transcripts of WWOX in a syndrome with multiple primary tumors

Ao Xu, Wei Wang, Jinfu Nie, Vivian W.Y. Lui, Bo Hong, Wenchu Lin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Multiple primary tumors are defined by the presence of two or more independent primary tumors in the same or different organs of an individual patient. However, the underlying genetic cause for the development of multiple primary tumors is largely unknown. In the study, we report a rare case with four synchronous distinct histological cancer types in a 26 years old Chinese female. In the patient, whole-exome sequencing identified a homozygous germline insertion mutation in WWOX which encodes the DNA repair-related enzyme, WW domain containing oxidoreductase. The mutation was found in a heterozygous state in her parents and brother without any cancer phenotype thus far. Surprisingly, we found multiple novel aberrant WWOX transcripts in the patient's normal colon tissue. The patient's colon metastasis from clear cell adenocarcinoma of the ovary showed a nonhypermutated profile enriched for C-T transition, and harbored somatic pathogenic mutations of HRAS, BRCA2, SMAD4, CHEK2, and AKT1 genes. To our knowledge, this is the first study reporting WWOX gene aberrations in a young patient with the early occurrence of multiple primary tumors.

Original languageEnglish (US)
Pages (from-to)19-25
Number of pages7
JournalJournal of Pathology
Volume249
Issue number1
DOIs
StatePublished - Sep 2019
Externally publishedYes

Keywords

  • WWOX
  • aberrant transcripts
  • colon and ovarian cancers
  • germline mutation
  • multiple primary tumors

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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