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Featured researches published by Gunter Heylens.


The Journal of Sexual Medicine | 2012

Long‐Term Evaluation of Cross‐Sex Hormone Treatment in Transsexual Persons

Katrien Wierckx; Sven C. Mueller; Steven Weyers; Eva Van Caenegem; Greet Roef; Gunter Heylens; Guy T'Sjoen

INTRODUCTION Long-term effects and side effects of cross-sex hormone treatment in transsexual persons are not well known. AIM The aim of this study is to describe the effects and side effects of cross-sex hormone therapy in both transsexual men and women. MAIN OUTCOME MEASURES Hormone levels were measured by immunoassays. Physical health was assessed by physical examination and questionnaires on general health and specific side effects, areal bone parameters by dual energy X-ray absorptiometry. METHODS Single center cross-sectional study in 100 transsexual persons post-sex reassignment surgery and on average 10 years on cross-sex hormone therapy. RESULTS Transsexual men did not experience important side effects such as cardiovascular events, hormone-related cancers, or osteoporosis. In contrast, a quarter of the transsexual women had osteoporosis at the lumbar spine and radius. Moreover, 6% of transsexual women experienced a thromboembolic event and another 6% experienced other cardiovascular problems after on average 11.3 hormone treatment years. None of the transsexual women experienced a hormone-related cancer during treatment. CONCLUSION Cross-sex hormone treatment appears to be safe in transsexual men. On the other hand, a substantial number of transsexual women suffered from osteoporosis at the lumbar spine and distal arm. Twelve percent of transsexual women experienced thromboembolic and/or other cardiovascular events during hormone treatment, possibly related to older age, estrogen treatment, and lifestyle factors. In order to decrease cardiovascular morbidity, more attention should be paid to decrease cardiovascular risk factors during hormone therapy management.


The Journal of Sexual Medicine | 2009

Long-term Assessment of the Physical, Mental, and Sexual Health among Transsexual Women

Steven Weyers; Els Elaut; Petra De Sutter; Jan Gerris; Guy T'Sjoen; Gunter Heylens; Griet De Cuypere; Hans Verstraelen

INTRODUCTION Transsexualism is the most extreme form of gender identity disorder and most transsexuals eventually pursue sex reassignment surgery (SRS). In transsexual women, this comprises removal of the male reproductive organs, creation of a neovagina and clitoris, and often implantation of breast prostheses. Studies have shown good sexual satisfaction after transition. However, long-term follow-up data on physical, mental and sexual functioning are lacking. AIM To gather information on physical, mental, and sexual well-being, health-promoting behavior and satisfaction with gender-related body features of transsexual women who had undergone SRS. METHODS Fifty transsexual women who had undergone SRS >or=6 months earlier were recruited. MAIN OUTCOME MEASURES Self-reported physical and mental health using the Dutch version of the Short-Form-36 (SF-36) Health Survey; sexual functioning using the Dutch version of the Female Sexual Function Index (FSFI). Satisfaction with gender-related bodily features as well as with perceived female appearance; importance of sex, relationship quality, necessity and advisability of gynecological exams, as well as health concerns and feelings of regret concerning transition were scored. RESULTS Compared with reference populations, transsexual women scored good on physical and mental level (SF-36). Gender-related bodily features were shown to be of high value. Appreciation of their appearance as perceived by others, as well as their own satisfaction with their self-image as women obtained a good score (8 and 9, respectively). However, sexual functioning as assessed through FSFI was suboptimal when compared with biological women, especially the sublevels concerning arousal, lubrication, and pain. Superior scores concerning sexual function were obtained in those transsexual women who were in a relationship and in heterosexuals. CONCLUSIONS Transsexual women function well on a physical, emotional, psychological and social level. With respect to sexuality, they suffer from specific difficulties, especially concerning arousal, lubrication, and pain.


European Journal of Endocrinology | 2013

Prevalence of cardiovascular disease and cancer during cross-sex hormone therapy in a large cohort of trans persons: a case control study

Katrien Wierckx; Els Elaut; E Declercq; Gunter Heylens; G De Cuypere; Youri Taes; Jean-Marc Kaufman; Guy T'Sjoen

OBJECTIVE This study evaluated the short- and long-term cardiovascular- and cancer-related morbidities during cross-sex hormone therapy in a large sample of trans persons. SUBJECTS AND METHODS A specialist center cross-sectional study compared 214 trans women (male-to-female transsexual persons) and 138 trans men (female-to-male trans persons) with an age- and gender-matched control population (1-3 matching). The participants were on cross-sex hormone therapy for an average of 7.4 years. We assessed physical health and possible treatment-related adverse events using questionnaires. RESULTS Five percent of trans women experienced venous thrombosis and/or pulmonary embolism during hormone therapy. Five of these adverse events occurred during the first year of treatment, while another three occurred during sex reassignment surgery. Trans women experienced more myocardial infarctions than the control women (P=0.001), but a similar proportion compared with control men. The prevalence of cerebrovascular disease (CVD) was higher in trans women than in the control men (P=0.03). The rates of myocardial infarction and CVD in trans men were similar to the control male and female subjects. The prevalence of type 2 diabetes was higher in both trans men and women than in their respective controls, whereas the rates of cancer were similar compared with the control men and women. CONCLUSION Morbidity rate during cross-sex hormone therapy was relatively low, especially in trans men. We observed a higher prevalence of venous thrombosis, myocardial infarction, CVD, and type 2 diabetes in trans women than in the control population. Morbidity rates in trans men and controls were similar, with the exception of the increased prevalence of type 2 diabetes.


The Journal of Sexual Medicine | 2012

Gender Identity Disorder in Twins: A Review of the Case Report Literature

Gunter Heylens; Griet De Cuypere; Kenneth J. Zucker; Cleo Schelfaut; Els Elaut; Heidi Vanden Bossche; Elfride De Baere; Guy T'Sjoen

INTRODUCTION The etiology of gender identity disorder (GID) remains largely unknown. In recent literature, increased attention has been attributed to possible biological factors in addition to psychological variables. AIM To review the current literature on case studies of twins concordant or discordant for GID. METHODS A systematic, comprehensive literature review. RESULTS Of 23 monozygotic female and male twins, nine (39.1%) were concordant for GID; in contrast, none of the 21 same-sex dizygotic female and male twins were concordant for GID, a statistically significant difference (P=0.005). Of the seven opposite-sex twins, all were discordant for GID. CONCLUSIONS These findings suggest a role for genetic factors in the development of GID.


The Journal of Sexual Medicine | 2011

Karyotyping, Is It Worthwhile in Transsexualism?

Adrien Inoubli; Griet De Cuypere; Robert Rubens; Gunter Heylens; Els Elaut; Eva Van Caenegem; Björn Menten; Guy T'Sjoen

INTRODUCTION Karyotyping is often performed in transsexual individuals. AIM Quantification and characterization of karyotype findings and abnormalities in transsexual persons. MAIN OUTCOME MEASURES Karyotypes were listed both in male-to-female and in female-to-male transsexual persons. METHODS The data were collected through a retrospective study. RESULTS Karyotypes of 368 transsexual individuals (251 male-to-female, 117 female-to-male) are described. Normal findings were found in 97.55%. Prevalence of abnormal karyotypes was 3.19% among male-to-female, and 0.85% among female-to-male transsexuals. Nine karyotypes showed variations; Klinefelter syndrome was confirmed in three persons, whereas others displayed autosomal aberrations. CONCLUSION Karyotyping is only of very limited information in the transsexual population.


European Journal of Endocrinology | 2008

Hypoactive sexual desire in transsexual women: prevalence and association with testosterone levels

Els Elaut; Griet De Cuypere; Petra De Sutter; Luk Gijs; Michael Van Trotsenburg; Gunter Heylens; Jean-Marc Kaufman; Robert Rubens; Guy T'Sjoen

OBJECTIVE An unknown proportion of transsexual women (defined as post-operative male-to-female transsexuals on oestrogen replacement) experience hypoactive sexual desire disorder (HSDD). It has been suggested that the absence of ovarian androgen production together with oestrogen treatment-related increase in sex hormone-binding globulin (SHBG) levels could be leading to HSDD, due to low levels of biologically available testosterone. This study wishes to document the HSDD prevalence among transsexual women and the possible association to androgen levels. DESIGN Cross-sectional study. METHODS Transsexual women (n=62) and a control group of ovulating women (n=30) participated in this study. Questionnaires measuring sexual desire (sexual desire inventory) and relationship and sexual satisfaction (Maudsley Marital Questionnaire) were completed. Serum levels of total testosterone, LH and SHBG were measured in blood samples obtained at random in transsexual women and in the early follicular phase in ovulating women. RESULTS The transsexual group had lower levels of total and calculated free testosterone (both P<0.001) than the ovulating women. HSDD was reported in 34% of the transsexual and 23% of the ovulating women (P=0.30). Both groups reported similar levels of sexual desire (P=0.97). For transsexual women, no significant correlation was found between sexual desire and total (P=0.64) or free testosterone (P=0.82). In ovulating women, these correlations were significant (P=0.006, resp. P=0.003). CONCLUSIONS HSDD is reported in one-third of transsexual women. This prevalence is not substantially different from controls, despite markedly lower (free) testosterone levels, which argues against a major role of testosterone in this specific group.


Clinical Neurology and Neurosurgery | 2013

Laughing gas abuse is no joke. An overview of the implications for psychiatric practice.

Céline Cousaert; Gunter Heylens; Kurt Audenaert

Abuse of nitrous oxide--also known as laughing gas--can lead to a number of well-known neurological symptoms but also to less documented psychiatric symptoms. Studies show abuse prevalence rates ranging from 12% to 20% among youngsters and thereby classify nitrous oxide as one of the five most frequently used inhalants. Its abuse still remains unrecognized in psychiatric settings, however. Since treatment is straightforward, it is important to raise the awareness of clinicians with respect to typical signs and symptoms. This paper presents a case report and gives an overview of the existing literature on psychiatric symptoms and therapy.


Journal of Autism and Developmental Disorders | 2018

The Co-occurrence of Gender Dysphoria and Autism Spectrum Disorder in Adults: An Analysis of Cross-Sectional and Clinical Chart Data

Gunter Heylens; Lore Aspeslagh; Jesper Dierickx; Kariann Baetens; Birgit Van hoorde; Griet De Cuypere; Els Elaut

Quantitative studies indicate an overrepresentation of ASD in individuals with GD. This study aims to determine the prevalence of autistic traits or ASD in adults with GD using two different data collection methods: (1) cross-sectional data using the social responsiveness scale-adults (SRS-A) and the autism quotient (AQ) (n = 63). (2) Clinical chart data (n = 532). Mean SRS-A scores were significantly higher compared to a norm population. Almost 5% of the patients with GD scored above the cut-off as measured by the AQ. In 32 patients (6%), a certain ASD diagnosis was found in the patient files, which is sixfold higher compared to the general population. Significantly more “birth assigned male” were affected compared to “birth assigned female”.


Journal of psychiatry | 2015

Transgender Persons Applying for Euthanasia in Belgium: A Case Report andImplications for Assessment and Treatment

Gunter Heylens; Els Elaut; Gerd Verschelden; Griet De Cuypere

Gender confirming treatment has proven to relief gender dysphoria as a symptom and to improve psychological functioning in transgender persons. Nevertheless, small percentage shows regret after their surgical treatment. Risk factors for regret are the presence of psychiatric problems, dissatisfaction with the results of surgery and poor socializing. In Belgium, euthanasia can be applied for in a situation of constant and unbearable mental or physical suffering. In recent years, three patients applied for euthanasia in the Gender clinic of the University Hospital Ghent, Belgium. We report on one case of a trans-woman applying for euthanasia and discuss on implications for assessment and treatment.


Acta Clinica Belgica | 2017

Anti-NMDA receptor encephalitis: still unknown and underdiagnosed by physicians and especially by psychiatrists?

Tine Hermans; Patrick Santens; Céline Matton; Kristine Oostra; Gunter Heylens; Sarah Herremans; Gilbert Lemmens

Abstract Anti-NMDA receptor encephalitis is an autoimmune disorder confirmed by the presence of antibodies against the NMDA-receptor in serum or CSF. This case report describes a young woman with anti-NMDA receptor encephalitis, who presented with prominent psychiatric symptoms. There was a crucial delay in diagnosis and necessary treatment due to the fact that the clinical presentation was diagnosed and treated as a first psychotic episode. Physicians and especially psychiatrists, should consider the possibility of an autoimmune encephalitis in their differential diagnosis in every new onset psychotic episode with rapid progression, the presence of pathognomonic orofacial dyskinesia, the lack of psychiatric history, and the non-responding to psychopharmacological treatment. Early diagnosis and treatment is essential for recovery and may improve the prognosis.

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Els Elaut

Ghent University Hospital

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Guy T'Sjoen

Ghent University Hospital

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Robert Rubens

Ghent University Hospital

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Katrien Wierckx

Ghent University Hospital

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Piet Hoebeke

Ghent University Hospital

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Steven Weyers

Ghent University Hospital

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Petra De Sutter

Ghent University Hospital

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