{"title":"Congenital Hypogonadotropic Hypogonadism With Novel Pathogenic Variants in FGFR1 and GNRHR.","authors":"Shinta Yamamoto, Hanako Nakajima, Hiroshi Okada, Naoko Nakanishi, Masahide Hamaguchi, Michiaki Fukui","doi":"10.1210/jcemcr/luae254","DOIUrl":null,"url":null,"abstract":"<p><p>Congenital hypogonadotropic hypogonadism (CHH) can cause delayed secondary sexual characteristics and contribute to juvenile osteoporosis, with multiple causative genes having been reported. We treated a 27-year-old man diagnosed with central hypogonadism, presenting with delayed secondary sexual characteristics and juvenile osteoporosis, using bone resorption inhibitors and testosterone therapy. Genetic testing revealed missense variants both in the fibroblast growth factor receptor 1 (<i>FGFR1</i>) and gonadotropin-releasing hormone receptor (<i>GNRHR</i>) genes, a combination that has not been previously reported. This case represents a CHH caused by a novel combination of gene variants not registered in the human genome mutation database.</p>","PeriodicalId":73540,"journal":{"name":"JCEM case reports","volume":"3 1","pages":"luae254"},"PeriodicalIF":0.0000,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11733946/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JCEM case reports","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1210/jcemcr/luae254","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Congenital hypogonadotropic hypogonadism (CHH) can cause delayed secondary sexual characteristics and contribute to juvenile osteoporosis, with multiple causative genes having been reported. We treated a 27-year-old man diagnosed with central hypogonadism, presenting with delayed secondary sexual characteristics and juvenile osteoporosis, using bone resorption inhibitors and testosterone therapy. Genetic testing revealed missense variants both in the fibroblast growth factor receptor 1 (FGFR1) and gonadotropin-releasing hormone receptor (GNRHR) genes, a combination that has not been previously reported. This case represents a CHH caused by a novel combination of gene variants not registered in the human genome mutation database.
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