PMS2 Pathogenic Variant in Lynch Syndrome-Associated Colorectal Cancer with Polyps

Author:

Poaty Henriette12,Bouya Lauria Batamba1,Lumaka Aimé34,Mongo-Onkouo Arnaud15,Gassaye Deby15

Affiliation:

1. Embryology and Genetic Laboratory, Faculty of Health Sciences, Marien Ngouabi University, Brazzaville, Congo

2. Department of Clinical Sciences, Institute of Research on Health Sciences, Brazzaville, Congo

3. Centre de Génétique de l'Université de Kinshasa, DR Congo

4. Service de Génétique Humaine, Sart Tilman, Avenue de l'Hôpital 13, 4000, Liège, Belgium

5. Gastro-Enterology and Internal Medicine Service, CHU Brazzaville, Congo

Abstract

AbstractBackground Lynch syndrome (LS) is an autosomal dominant condition due to the germline mutation in the mismatch repair (MMR) genes including MLH1, MSH2, MSH6, and PMS2 (post-meiotic segregation increased 2). The MMR mutation carriers have high risk for cancers. Pathogenic PMS2 variants are rarely reported in LS-associated colorectal cancer (CRC) with colorectal polyps. The aim of the study was to investigate the genetic etiology of CRC in an individual with CRC with multiple colorectal polyps and a family history of cancers.Patients and Methods The index patient was an African male affected by CRC with multiple colorectal polyps. The clinical diagnostic for LS was based on the Amsterdam II criteria and pedigree. Next-generation sequencing with inherited cancer genes panel was used to detect the pathogenic variant.Results The patient fulfilled the Amsterdam II criteria and the pedigree revealed a family history of recurrent CRC. A deleterious PMS2 germline heterozygous mutation c.2192_2196delTAACT was detected.Conclusion Our study supports the notion that LS may be associated with polyps and shows the predisposition of PMS2 heterozygous mutation in LS-associated CRC at young age.

Publisher

Georg Thieme Verlag KG

Subject

Literature and Literary Theory,History,Cultural Studies

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