A novel compound variant in GNRHR causing congenital idiopathic hypogonadotropic hypogonadism in a young male Korean patient.

Lee, Gimin; Lee, Mi Seon; Lee, Rosie; Moon, Jung Eun

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Ann Pediatr Endocrinol Metab > Accepted Articles

Case report

DOI: https://doi.org/10.6065/apem.2244070.035 [Accepted] Published online June 30, 2022.

A novel compound variant in GNRHR causing congenital idiopathic hypogonadotropic hypogonadism in a young male Korean patient.

Gimin Lee, Mi Seon Lee, Rosie Lee, Jung Eun Moon

Department of Pediatrics, School of Medicine, Kyungpook National University , Kyungpook National University Hospital, Daegu, Korea

Address for correspondence: Jung Eun Moon
Email: Subuya@daum.net

Received: February 25, 2022 Revised: May 10, 2022 Accepted: May 11, 2022

Abstract

Idiopathic hypogonadotropic hypogonadism (IHH) is a disease that shows symptoms of no or incomplete sexual maturation after 18 years old. The mutation of gonadotropin releasing hormone receptor gene (GNRHR) has been reported as the cause in 16% of total IHH patients. An 18-year-old adolescent was referred to endocrinology department for hypogonadism. He was born with cryptorchidism, had small testes at the age of 7 years, and showed low testosterone levels. Management of his hypogonadism was delayed due to his uncontrolled nephrotic syndrome. There were no abnormal findings on the brain MRI; atrophied testes discovered on his pelvis MRI; low levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), and testosterone were observed. In the HCG simulation test, testosterone levels showed no significant increase, rising from 1.11 to 1.15 ng/dL. The patient harbored a novel compound heterozygous variant of c.514G>A (p.Gly172Arg) and c.113G>A (p.Arg38Gln) in the GNRHR gene. Here, we report a case of new GNRHR compound variant c.514G>A (p.Gly172Arg) and c.113G>A (p.Arg38Gln) in a Korean adolescent for hypogonadotropic hypogonadism.

Keywords: Hypogonadism, Receptors, LHRH, Delayed Puberty.