Clinical Heterogeneity in two patients with Noonan-like Syndrome associated with the same SHOC2 mutation
نویسندگان
چکیده
Noonan-like syndrome with loose anagen hair (NS/LAH; OMIM #607721) has been recently related to the invariant c.4A > G missense change in SHOC2. It is characterized by features reminiscent of Noonan syndrome. Ectodermal involvement, short stature associated to growth hormone (GH) deficiency (GHD), and cognitive deficits are common features. We compare in two patients with molecularly confirmed NS/LAH diagnosis, the clinical phenotype and pathogenetic mechanism underlying short stature. In particular, while both the patients exhibited a severe short stature, GH/IGFI axis functional evaluation revealed a different pathogenetic alteration, suggesting in one patient an upstream alteration (typical GHD) and in the other one a peripheral GH insensitivity.
منابع مشابه
Noonan syndrome with loose anagen hair associated with trichorrhexis nodosa and trichoptilosis
We report a case of Noonan syndrome with loose anagen hair (NS/LAH), a rare variant of Noonan syndrome, with associated trichorrhexis nodosa and trichoptilosis. The SHOC2 mutation may be responsible for these additional hair shaft defects, revealing the importance of microscopic examination of hairs in these patients.
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Noonan syndrome is a genetic condition inherited by an autosomally dominant manner, characterised by congenital heart disease, short stature, abnormal facies and the somatic feature of Turner's syndrome, but a normal karyotype. Noonan syndrome affects approximately 1 in 1500 live births. Congenital heart disease occurs in 35-50% of patients diagnosed with noonan syndrome. The most common cardia...
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