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Jensen JM, Skakkebæk A, Gaustadness M, Sommerlund M, Gjørup H, Ljungmann K, Lautrup CK, Sunde L. Familial colorectal cancer and tooth agenesis caused by an AXIN2 variant: how do we detect families with rare cancer predisposition syndromes? Fam Cancer 2021; 21:325-332. [PMID: 34637023 DOI: 10.1007/s10689-021-00280-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Accepted: 10/03/2021] [Indexed: 11/29/2022]
Abstract
We present a three-generation family with an AXIN2 variant and a family history of colorectal cancer (CRC), colon polyps and tooth agenesis. A likely pathogenic variant was detected in the AXIN2 gene (c.1994dup; p.(Asn666Glnfs*41)). This variant has previously been associated with tooth agenesis and polyposis, only. In this case report we describe eight carriers with tooth agenesis and variable clinical findings, including polyps and CRC. Our case provides additional knowledge to the sparse data on genotype-phenotype association related to AXIN2 associated cancer syndrome. Further, our case highlights the importance of analysing an extended CRC and oligodontia/ectodermal dysplasia gene panel including AXIN2 but also raises awareness and discussion about appropriate surveillance program.
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Affiliation(s)
- Janni M Jensen
- Department of Clinical Genetics, Aalborg University Hospital, Ladegaardsgade 5,5, 9000, Aalborg, Denmark.
| | - Anne Skakkebæk
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Mette Gaustadness
- Department of Molecular Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Mette Sommerlund
- Department of Dermatology, Aarhus University Hospital, Aarhus, Denmark
| | - Hans Gjørup
- Department of Oral and Maxillofacial Surgery, Resource Centre for Oral Health in Rare Medical Conditions, Aarhus University Hospital, Aarhus, Denmark
| | - Ken Ljungmann
- Department of Surgery, Aarhus University Hospital, Aarhus, Denmark.,Institute of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Charlotte K Lautrup
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Lone Sunde
- Department of Clinical Genetics, Aalborg University Hospital, Ladegaardsgade 5,5, 9000, Aalborg, Denmark.,Institute of Biomedicine, Aarhus University, Aarhus, Denmark
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