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  2. Late-onset hypogonadism - Wikipedia

    en.wikipedia.org/wiki/Late-onset_hypogonadism

    As of 2016, the International Society for the Study of the Aging Male defines late-onset hypogonadism as a series of symptoms in older adults related to testosterone deficiency that combines features of both primary and secondary hypogonadism; the European Male Aging Study (a prospective study of ~3000 men) [10] defined the condition by the presence of at least three sexual symptoms (e.g ...

  3. Kallmann syndrome - Wikipedia

    en.wikipedia.org/wiki/Kallmann_syndrome

    This occurs in an estimated 10 to 22% of people, primarily cases of normosmic congenital hypogonadotropic hypogonadism (CHH) rather than KS cases and only found in people who have undergone some form of testosterone replacement therapy. It is only normally discovered when testicular volume increases while on testosterone treatment alone and ...

  4. Leydig cell hypoplasia - Wikipedia

    en.wikipedia.org/wiki/Leydig_cell_hypoplasia

    The symptoms of Leydig cell hypoplasia include pseudohermaphroditism, i.e., feminized, ambiguous, or relatively mildly underdeveloped (e.g., micropenis, severe hypospadias, [6] and/or cryptorchidism [undescended testes]) external genitalia, a female gender identity or gender variance, hypergonadotropic hypogonadism (hypogonadism despite high levels of gonadotropins), delayed, impaired, or ...

  5. Hypogonadism - Wikipedia

    en.wikipedia.org/wiki/Hypogonadism

    In men, it causes impaired muscle and body hair development, gynecomastia, decreased height, erectile dysfunction, and sexual difficulties. If hypogonadism is caused by a disorder of the central nervous system (e.g., a brain tumor), then this is known as central hypogonadism.

  6. Hypogonadotropic hypogonadism - Wikipedia

    en.wikipedia.org/wiki/Hypogonadotropic_hypogonadism

    Hypogonadotropic hypogonadism (HH), is due to problems with either the hypothalamus or pituitary gland affecting the hypothalamic-pituitary-gonadal axis (HPG axis). [1] Hypothalamic disorders result from a deficiency in the release of gonadotropic releasing hormone ( GnRH ), while pituitary gland disorders are due to a deficiency in the release ...

  7. Malouf syndrome - Wikipedia

    en.wikipedia.org/wiki/Malouf_syndrome

    Malouf syndrome (also known as "congestive cardiomyopathy-hypergonadotropic hypogonadism syndrome") is a congenital disorder that causes one or more of the following symptoms: intellectual disability, ovarian dysgenesis, congestive cardiomyopathy, broad nasal base, blepharoptosis, and bone abnormalities, and occasionally marfanoid habitus (tall stature with long and thin limbs, little ...

  8. XXYY syndrome - Wikipedia

    en.wikipedia.org/wiki/XXYY_syndrome

    48,XXYY syndrome is a condition related to the X and Y chromosomes (the sex chromosomes). People normally have 46 chromosomes in each cell.Two of the 46 chromosomes, known as X and Y, are called sex chromosomes because they help determine whether a person will develop male or female sex characteristics.

  9. Gonadal dysgenesis - Wikipedia

    en.wikipedia.org/wiki/Gonadal_dysgenesis

    The degree of development of the male reproductive tract is determined by the ratio of germ line cells expressing the XY genotype. [ 21 ] [ 23 ] Manifestations of mixed gonadal dysgenesis are highly variable with asymmetry in gonadal development of testis and streak gonad, accounted for by the percentage of cells expressing XY genotype.