ArticleHereditary cancer in clinical practice2022
Multiple endocrine neoplasia type 1: a new germline "homozygous" variant (c.201delC) caused by detection errors.
Article in Hereditary cancer in clinical practice, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMultiple endocrine neoplasia type 1 (MEN1) is a hereditary cancer syndrome caused by germline variants in the MEN1 gene located on chromosome 11q13. We found a Chinese woman who had a pancreatic tumor, parathyroid tumor, adrenal tumor, and suspicion of gastrinoma. CASE PRESENTATION: The proband and her immediate family members underwent genetic detection. The results showed that two of the proband's six relatives had the same variants as the proband, and her sister also had the typical symptoms of MEN1. However, the first- and second-time genetic detection results showed that they were homozygous variants, which did not conform to Mendelian inheritance laws. Multiplex ligation-dependent probe amplification (MLPA) was used to rule out homozygous variants caused by a deletion of gene fragments in the proband and her immediate family members. The MLPA results showed that the gene deletion was absent in the MEN1. The results from the third genetic detection (redesigned the primer) showed that they had a heterozygous variant. A new MEN1 germline variant [c.201delC (p.Ala68Profs*51)], which could induce MEN1, was found in this study.
conclusionsThis newly identified germline variant could improve the identification of clinical phenotypes and the early diagnosis of MEN1. Clinician should consider the present of situation that intron variant causing detection error. Re-designing the primers close to the variant site for gene detection could avoid this situation.
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