A unique case of two somatic APC mutations in an early onset cribriform-morular variant of papillary thyroid carcinoma and overview of the literature

M D Aydemirli, K van der Tuin, F J Hes, A M W van den Ouweland, T van Wezel, E Kapiteijn, H Morreau

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report a case of a 22-year-old female patient who was diagnosed with a cribriform-morular variant of papillary thyroid carcinoma (CMV-PTC). While at early ages this thyroid cancer variant is highly suggestive for familial adenomatous polyposis (FAP), there was no family history of FAP. In the tumor biallelic, inactivating APC variants were identified. The patient tested negative for germline variants based on analysis of genomic DNA from peripheral blood leukocytes. Somatic mosaicism was excluded by subsequent deep sequencing of leukocyte and normal thyroid DNA using next generation sequencing (NGS). This report presents a rare sporadic case of CMV-PTC, and to the best of our knowledge the first featuring two somatic APC mutations underlying the disease, with an overview of CMV-PTC cases with detected APC and CTNNB1 pathogenic variants from the literature.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalFamilial Cancer
Volume19
Issue number1
Early online date2019
DOIs
Publication statusPublished - Jan 2020

Keywords

  • APC
  • Cribriform-morular
  • Cribriform-morular variant papillary thyroid carcinoma
  • FAP
  • Familial adenomatous polyposis
  • Thyroid carcinoma
  • Wnt
  • β-catenin

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