Giriş ve Amaç: Nörofibromatozis tip 1 başlıca cafe au lait lekeleri, Lisch nodülleri ve nörofibromlarla karakterize otozomal dominant kalıtımlı bir rasopatidir. Bu çalışmada amacımız, NF1 ön tanısıyla başvuran hastaların genotipik verilerini sunmaktır.
Gereç ve Yöntemler: 2018 Haziran–2022 Haziran tarihleri arasında yaş ortalaması 8,1 yaş (2 ay-28 yaş aralığında) olan 22 olgu NF1 ön tanısıyla değerlendirildi. Hastalara NF1 geni dizi analizi yapıldı.
Bulgular: NF1 geni dizi analizi yöntemiyle tanı oranı %90,9 idi. 16 farklı NF1 geni varyantından 13 (%81,25) 'ü patojenik/muhtemel patojenik iken, 3 (%18,75)'ü ise klinik önemi bilinmeyen varyantlardı.
Sonuç: NF1 ön tanısıyla başvuran hastalardaki genetik tanı oranı ve klinik bulguları literatür verileri eşliğinde tartışıldı. 4 yeni NF1 geni varyantı saptandı.
<b><i>Introduction:</i></b> Global developmental delay (DD), intellectual disability (ID), and autism spectrum disorder (ASD) are mainly evaluated under the neurodevelopmental disorder framework. In this study, we aimed to determine the genetic diagnosis yield using step-by-step genetic analysis in 38 patients with unexplained ID/DD and/or ASD. <b><i>Methods:</i></b> In 38 cases (27 male, 11 female) with unexplained ID/DD and/or ASD, chromosomal microarray (CMA) analysis, clinical exome sequencing (CES), and whole-exome sequencing (WES) analysis were applied, respectively. <b><i>Results:</i></b> We found a diagnostic rate of only CMA analysis as 21% (8/38) presenting 8 pathogenic and likely pathogenic CNVs. The rate of patients diagnosed with CES/WES methods was 32.2% (10/31). When all pathogenic and likely pathogenic variants were evaluated, the diagnosis rate was 44.7% (17/38). A dual diagnosis was obtained in a case with 16p11.2 microduplication and de novo SNV. We identified eight novel variants: <i>TUBA1A</i> (c.787C>G), <i>TMEM63A</i> (c.334-2A>G), <i>YY1AP1</i> (c.2051_2052del), <i>ABCA13</i> (c.12064C>T), <i>ABCA13</i> (c.13187G>A), <i>USP9X</i> (c.1189T>C), <i>ANKRD17</i> (c.328_330dup), and <i>GRIA4</i> (c.17G>A). <b><i>Conclusion:</i></b> We present diagnostic rates of a complementary approach to genetic analysis (CMA, CES, and WES). The combined use of genetic analysis methods in unexplained ID/DD and/or ASD cases has contributed significantly to diagnosis rates. Also, we present detailed clinical characteristics to improve genotype-phenotype correlation in the literature for rare and novel variants.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.