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Correa Brito, Lourdes; Keselman, Ana; Villegas, Florencia; Scaglia, Paula; Esnaola Azcoiti, María; Castro, Sebastián; Sanguineti, Nora; Izquierdo, Agustín; Maier, Marianela; Bergadá, Ignacio; Arberas, Claudia; Rey, Rodolfo A; Ropelato, María Gabriela
Frontiers in genetics, 03/2024, Volume: 15Journal Article
Pubertal delay can be due to hypogonadotropic hypogonadism (HH), which may occur in association with anosmia or hyposmia and is known as Kallmann syndrome (OMIM #308700). Recently, hypogonadotropic hypogonadism has been suggested to overlap with Witteveen-Kolk syndrome (WITKOS, OMIM #613406) associated with 15q24 microdeletions encompassing . Whether hypogonadotropic hypogonadism is due to haploinsufficiency of or any of the other eight genes present in 15q24 is not known. We report the case of a female patient with delayed puberty associated with intellectual disability, behavior problems, dysmorphic facial features, and short stature, at the age of 14 years. Clinical, laboratory, and imaging assessments confirmed the diagnosis of Kallmann syndrome. Whole-exome sequencing identified a novel heterozygous frameshift variant, NM_001145358.2:c.3045_3046dup, NP_001138830.1:p.(Ile1016Argfs*6) in , classified as pathogenic according to the American College of Medical Genetics and Genomics (ACMG/AMP) criteria. Reverse phenotyping led to the clinical diagnosis of WITKOS. No other variant was found in the 96 genes potentially related to hypogonadotropic hypogonadism. The analysis of the other contiguous seven genes to in 15q24 did not reveal any clinically relevant variant. In conclusion, these findings point to as the gene in 15q24 related to the reproductive phenotype in patients with overlapping WITKOS and Kallmann syndrome.
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