Abstract
In terms of their gender-related behavior, persons with (non-intersex) gender identity disorder (GID; aka transsexualism) of early onset resemble patients with somatic intersexuality who request a change of gender. However, there is currently no known intersex analog for GID of late onset. Neuroanatomy studies of somatic intersex are too few for providing any guidance on what brain effects to expect in a putative CNS-limited form of intersexuality as the basis for (non-intersex) GID. Findings in GID patients of atypical androgen levels apply only to about one-third of female-to-male transsexuals and not at all to male-to-female transsexuals. Sex steroid-related findings of genetic polymorphisms are weak, inconsistent, and largely unreplicated. Neuroanatomic findings are few and also largely unreplicated; distributions for patients with GID overlap with those of controls and are therefore of questionable utility for GID diagnosis. Given the complexity of gendered behavior and identity, the neuroanatomic basis of GID is likely to be neural networks rather than individual brain nuclei or regions. Findings on neurofunction in persons with GID are few and unreplicated. In summary, the emerging data are interesting, but at this time insufficient to constitute a firm basis for the recategorization of GID as a form of CNS-limited intersexuality.
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References
American Psychiatric Association (2000) Diagnostic and statistical manual of mental disorders (4th edn., text revision). Author: Washington, DC
Arnold AP (2009) The organizational-activational hypothesis as the foundation for a unified theory of sexual differentiation of all mammalian tissues. Horm Behav 55(5):570–578
Bentz E-K, Schneeberger C, Hefler LA et al (2007) A common polymorphism of the SRD5A2 gene and transsexualism. Reprod Sci 14(7):705–709
Bentz E-K, Hefler LA, Kaufmann U et al (2008) A polymorphism of the CYP17 gene related to sex steroid metabolism is associated with female-to-male but not male-to-female transsexualism. Fertil Steril 90:56–59
Berglund H, Lindström P, Dhejne-Helmy C et al (2008) Male-to-female transsexuals show sex-atypical hypothalamus activation when smelling odorous steroids. Cereb Cortex 18:1900–1908
Blanchard R (2008) The concept of autogynephilia and the typology of male gender dysphoria. J Nerv Ment Dis 177(10):616–623
Bosinski HA, Peter M, Bonatz G et al (1997) A higher rate of hyperandrogenic disorders in female-to-male transsexuals. Psychoneuroendocrinology 22:361–380
Ciumas C, Lindén Hirschberg A, Savic I (2009) High fetal testosterone and sexually dimorphic cerebral networks in females. Cereb Cortex 19(5):1167–1174
Cosgrove KP, Mazure CM, Staley JK (2007) Evolving knowledge of sex differences in brain structure, function, and chemistry. Biol Psychiatry 62:847–855
Dewing P, Shi T, Horvath S et al (2003) Sexually dimorphic gene expression in mouse brain precedes gonadal differentiation. Brain Res Mol Brain Res 118(1-2):82–90
First MB (2005) Desire for amputation of a limb: Paraphilia, psychosis, or a new type of identity disorder. Psychol Med 35:919–928
Garcia-Falgueras A, Swaab DF (2008) A sex difference in the hypothalamic uncinate nucleus: Relationship to gender identity. Brain 131:3132–3146
Gizewski ER, Krause E, Schlamann M et al (2009) Specific cerebral activation due to visual erotic stimuli in male-to-female transsexuals compared with male and female controls: An fMRI study. J Sex Med 6:440–448
Grumbach MM, Hughes IA, Conte FA (2003) Disorders of sex differentiation. In: Larson PR, Kronenberg HM, Melmed S, Polonsky KS (eds) Williams Textbook of Endocrinology, 10th edn (pp 842–1002). Philadelphia: W.B. Saunders
Hare L, Bernard P, Sánchez FJ et al (2009) Androgen receptor repeat length polymorphism associated with male-to-female transsexualism. Biol Psychiatry 65:93–96
Hembree WC, Cohen-Kettenis P, Delemarre-van de Waal HA et al (2009) Endocrine treatment of transsexual persons: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab 94(9):3132–3154
Henningsson S, Westberg L, Nilsson S et al (2005) Sex steroid-related genes and male-to-female transsexualism. Psychoneuroendocrinology 30:657–664
Hughes IA, Houk C, Ahmed SF et al (2006) Consensus statement on management of intersex disorders. Arch Dis Child 91(7):554–563
Kruijver FP, Zhou J, Pool C et al (2000). Male-to-female transsexuals have female neuron numbers in a limbic nucleus. J Clin Endocrinol Metab 85:2034–2041
Lawrence AA (2009) Erotic target location errors: an underappreciated paraphilic dimension. J Sex Res 46:194–215
Luders E, Sánchez FJ, Gaser C et al (2009) Regional gray matter variation in male-to-female transsexualism. Neuroimage 46:904–907
Maheu FS, Merke DP, Schroth EA et al (2008) Steroid abnormalities and the developing brain: declarative memory for emotionally arousing and neutral material in children with congenital adrenal hyperplasia. Psychoneuroendocrinology 33(2):238–245
Martin CL, Ruble DN (2010) Patterns of gender development. Annu Rev Psychol 61:353–381
Merke DP, Fields JD, Keil MF et al (2003) Children with classic congenital adrenal hyperplasia have decreased amygdala volume: potential prenatal and postnatal hormonal effects. J Clin Endocrinol Metab 88(4):1760–1765
Meyer-Bahlburg HFL, Dolezal C, Baker SW et al (2004) Prenatal androgenization affects gender-related behavior but not gender identity in 5-12 year old girls with congenital adrenal hyperplasia. Arch Sex Behav 33:97–104
Meyer-Bahlburg HFL, Dolezal C, Baker SW et al (2006) Gender development in women with congenital adrenal hyperplasia as a function of disorder severity. Arch Sex Behav 35:667–684
Meyer-Bahlburg HFL, Dolezal C, Baker SW et al (2008) Sexual orientation in women with classical or non-classical congenital adrenal hyperplasia as a function of degree of prenatal androgen excess. Arch Sex Behav 37:85–99
Meyer-Bahlburg HF (2010) From mental disorder to iatrogenic hypogonadism: dilemmas in conceptualizing gender identity variants as psychiatric conditions. Arch Sex Behav 39(2):461–476
Mueller A, Gooren LJ, Naton-Schötz S et al (2008) Prevalence of polycystic ovary syndrome and hyperandrogenemia in female-to-male transsexuals. J Clin Endocrinol Metab 93(4):1408–1411
Pilgrim C, Reisert I (1992) Differences between male and female brains–developmental mechanisms and implications. Horm Metab Res 24(8):353–359
Ruble DN, Martin CL, Berenbaum SA (2006) Gender development. In: Damon W, Lerner RM (series eds), and Eisenberg N, Damon W, Lerner RM (vol eds), Handbook of child psychology: Vol. 3. Social, emotional, and personality development (6th edn, pp 858–932). New York: Wiley
Schöning S, Engelien A, Bauer C et al (2010) Neuroimaging differences in spatial cognition between men and male-to-female transsexuals before and during hormone therapy. J Sex Med 7(5):1858–1867
Ujike H, Otani K, Nakatsuka M et al (2009) Association study of gender identity disorder and sex hormone-related genes. Prog Neuropsychopharmacol Biol Psychiatry 33(7):1241–1244
Vance SR Jr, Cohen-Kettenis PT, Drescher J et al (2010) Opinions about the DSM gender identity disorder diagnosis: results from an international survey administered to organizations concerned with the welfare of transgender people. Int J Transgenderism 12(1):1–14
Wallen K, Hassett JM (2009) Sexual differentiation of behaviour in monkeys: role of prenatal hormones. J Neuroendocrinol 21(4):421–426
Yang X, Schadt EE, Wang S et al (2006) Tissue-specific expression and regulation of sexually dimorphic genes in mice. Genome Res 16(8):995–1004
Zhou J-N, Hofman MA, Gooren LJG et al (1995) A sex difference in the human brain and its relation to transsexuality. Nature 378:68–70
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This work was supported, in part, by NIMH grant P30-MH-43530 (P.I.: Anke A. Ehrhardt, Ph.D.).
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Meyer-Bahlburg, H.F. (2011). Transsexualism (“Gender Identity Disorder”) – A CNS-Limited Form of Intersexuality?. In: New, M., Simpson, J. (eds) Hormonal and Genetic Basis of Sexual Differentiation Disorders and Hot Topics in Endocrinology: Proceedings of the 2nd World Conference. Advances in Experimental Medicine and Biology, vol 707. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-8002-1_17
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DOI: https://doi.org/10.1007/978-1-4419-8002-1_17
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