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GTR Home > Conditions/Phenotypes > Hypogonadotropic hypogonadism 9 with or without anosmia

Hypogonadotropic hypogonadism 9 with or without anosmia

Synonyms
HYPOGONADOTROPIC HYPOGONADISM 9 WITH ANOSMIA, SUSCEPTIBILITY TO; HYPOGONADOTROPIC HYPOGONADISM 9 WITHOUT ANOSMIA, SUSCEPTIBILITY TO; NELF-Related Hypogonadotropic Hypogonadism

Summary

Isolated gonadotropin-releasing hormone (GnRH) deficiency (IGD) is characterized by inappropriately low serum concentrations of the gonadotropins LH (luteinizing hormone) and FSH (follicle-stimulating hormone) in the presence of low circulating concentrations of sex steroids. IGD is associated with a normal sense of smell (normosmic IGD) in approximately 40% of affected individuals and an impaired sense of smell (Kallmann syndrome) in approximately 60%. IGD can first become apparent in infancy, adolescence, or adulthood. Infant boys with congenital IGD often have micropenis and cryptorchidism. Adolescents and adults with IGD have clinical evidence of hypogonadism and incomplete sexual maturation on physical examination. Adult males with IGD tend to have prepubertal testicular volume (i.e., <4 mL), absence of secondary sexual features (e.g., facial and axillary hair growth, deepening of the voice), decreased muscle mass, diminished libido, erectile dysfunction, and infertility. Adult females have little or no breast development and primary amenorrhea. Although skeletal maturation is delayed, the rate of linear growth is usually normal except for the absence of a distinct pubertal growth spurt. [from GeneReviews]

Available tests

25 tests are in the database for this condition.

Clinical tests (25 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: HH9, NELF, NSMF
    Summary: NMDA receptor synaptonuclear signaling and neuronal migration factor

Clinical features

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Imported from Human Phenotype Ontology (HPO)

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