Floating-Harbor Syndrome in a Korean Patient with Short Stature and Early Puberty: A Case Report

Floating-Harbor syndrome (FHS) is a rare autosomal dominant genetic disorder characterized by proportionately short stature, lack of expressive language, and distinctive facial features, including a large nose, long eyelashes, deeply set eyes, and a triangular face. We present a case of an 11-year-old Korean girl who was initially suspected of having Noonan-like syndrome but was later diagnosed with Floating- Harbor syndrome. The patient exhibited short stature, developmental language delay, dysmorphic facial features, and early puberty. Targeted exome sequencing revealed a heterozygous mutation, C.7303OT (p.Arg2435Ter), in the SRCAP gene, confirming a diagnosis of Floating- Harbor syndrome. She responded well to human recombinant growth hormone and gonadotropin-releasing hormone (GnRH) agonist, effectively suppressing bone maturation and improving her height SDS from -4.6 to -2.4.