Disorders of sexual differentiation

A Case Report of a Rare 46,XX/47,XXY Mosaicism With Ovotesticular Disorder of Sex Development and a Literature Review

Klinefelter syndrome (KS) is a common chromosomal abnormality in males, usually presenting as a 47,XXY karyotype and often underdiagnosed. Rarely, KS occurs as mosaic 46,XX/47,XXY. At the same time, ovotesticular disorder of sex development (OT-DSD) is also a rare condition in which both ovarian and testicular structures are present in the same individual, often associated with a 46,XX karyotype. The combination of mosaic 46,XX/47,XXY with OT-DSD is scarce. Herein, we report a new case of a six-month-old infant with unilateral OT-DSD and a 46,XX/47,XXY mosaic karyotype who presented with atypical genitalia at birth. On examination, the external genitalia showed asymmetry of the labioscrotal folds, an empty right fold, a 2.5 cm phallic structure, and a perineal urethral meatus. Imaging studies revealed a uterus and a vaginal cavity, as well as an ovotestis on the left side and an ovarian remnant on the right side. An unexpected increase in testosterone level was observed. Cytogenetics analysis confirmed a mosaic karyotype with 54% of 46,XX and 46% 47,XXY cells. Molecular genetic analysis revealed no mutations in the genes involved in gonadal development. These findings are discussed and the clinical characteristics of the reported cases of 46,XX/47,XXY with OT-DSD are summarized. In conclusion, atypical genitalia leads to the early diagnosis of the rare 46,XX/47,XXY mosaicism with OT-DSD. Mosaicism should be considered in all cryptorchidism cases. Persistent Müllerian structures were common, and the nearly male phenotype of the external genitalia led parents to prefer the male sex of rearing.

Supernumerary Kidneys Associated with Disorders of Sexual Development and Cloacal Anomaly: A Case Report

Introduction

The term "disorders of sexual differentiation" refers to a variety of issues that result in the baby's genitalia being underdeveloped or showing characteristics shared by both sexes. Normal sexual development in utero requires a precise and coordinated spatiotemporal sequence of numerous activating and suppressing factors. Inadequate development of the bipotential gonad into an ovary or a testis is one of the most frequent causes of genital ambiguity (partial gonadal dysgenesis). One in every 50,000 babies suffers from cloacal anomalies, which makes it one of the rarest congenital malformations. The supernumerary kidney is an extremely uncommon congenital abnormality with less than 100 cases reported in the literature.

Case

We present five days old neonate admitted to the neonatal intensive care unit with a complaint of absence of anal orifice. The baby had not passed meconium within 48 hours after delivery, but the families later realized that meconium had been passing through the urethral orifice along with urine. The child was born to a 32-year-old para-four woman who claims to have been amenorrheic for the past nine months but could not recall her last regular period. On physical examination, the abdomen was grossly distended, and there was no anal opening other than just a dimple on the sacrococcygeal area, and the external genitalia appears female on inspection with labia majora well developed and no fusion.

Conclusion

Disorder of sexual differentiation is a clinically diverse set of diseases that interferes with the proper differentiation and determination of sex in the embryo and fetus. One in 50,000 live births results in cloacal abnormalities, which are extremely uncommon. Less than 100 examples of the supernumerary kidney have been documented in the literature, making it an exceptionally rare congenital anomaly.

Physiology, pathology and pharmacology of the male reproductive system

The male reproductive system consists of the testes, a ductal system and sex accessory organs. Production of sperm by the testes combined with fluids formed by the sex accessory organs (e.g. seminal vesicles, prostate and bulbourethral glands) produce a secretion that supports the survival of spermatozoa and provides a medium through which they can move through the reproductive ducts (e.g. epididymis, vas deferens, ejaculatory duct and urethra) for ejaculation of viable sperm into the female reproductive tract. Summarized herein are the essentials of normal male reproductive physiology, disorders of male sexual differentiation, pharmacological therapy of common diseases of the male genitourinary tract and the impact of drugs of abuse on the male reproductive system.

Research on quality of life in female patients with congenital adrenal hyperplasia and issues in developing nations

Congenital adrenal hyperplasia (CAH) is the commonest cause of ambiguous genitalia for female newborns and is one of the conditions under the umbrella term of "Disorders of Sex Development" (DSD). Management of these patients require multidisciplinary collaboration and is challenging because there are many aspects of care, such as the most appropriate timing and extent of feminizing surgery required and attention to psychosexual, psychological, and reproductive issues, which still require attention and reconsideration, even in developed nations. In developing nations, however, additional challenges prevail: poverty, lack of education, lack of easily accessible and affordable medical care, traditional beliefs on intersex, religious, and cultural issues, as well as poor community support. There is a paucity of long-term outcome studies on DSD and CAH to inform on best management to achieve optimal outcome. In a survey conducted on 16 patients with CAH and their parents in a Malaysian tertiary center, 31.3% of patients stated poor knowledge of their condition, and 37.5% did not realize that their medications were required for life. This review on the research done on quality of life (QOL) of female patients with CAH aims: to discuss factors affecting QOL of female patients with CAH, especially in the developing population; to summarize the extant literature on the quality of life outcomes of female patients with CAH; and to offer recommendations to improve QOL outcomes in clinical practice and research.

Ambiguous genitalia: a case study involving a 24-week-gestation twin B

When recognized in the extremely premature infant in the delivery room, ambiguous genitalia is a devastating diagnosis. It can be even more so, if the diagnosis is made several weeks later. The case study reported here illustrates this point. A 24-week Twin B infant born with multiple congenital anomalies was originally thought to be a male. After two weeks, assessment by an astute bedside nurse revealed that the infant's genitalia were not consistent with those of other 24-week males. A complete workup followed. Twin B was indeed a female with ambiguous genitalia and a high cloacal anomaly. Faced with the uncertainty of ambiguous genitalia, many parents feel emptiness, grief, and guilt. This article differentiates among the various intersex disorders and their treatments, and discusses physical findings, embryologic development, incidence, and treatment plans for male pseudohermaphroditism, true hermaphroditism, gonadal dysgenesis, and female pseudohermaphroditism. Current management strategies are contrasted with protocols of the 1950s to show changes over time.

Pediatric disorders of sex development

The management of disorders of sexual differentiation (DSD) involves a multidisciplinary approach. The main aim of analysis was to study the phenotype-karyotype correlation in North Indian children with DSD. The records of pediatric DSD were retrieved and characteristics noted. Of total of 58 children, 43 (74.1%) and 10 (17.2%) were raised as males and females respectively. The mean age at presentation was 31.3+/-9 months. The karyotype was 46XY in 45 (77.6%) and 46XX in 12 (20.7%). CAH was commonest cause of DSD (36.2%), followed by gonadal dysgenesis. Of the 15 patients of 46 XY CAH, there were 5 with 17-alpha hydroxylase deficiency, 2 with 3-beta HSD deficiency and one case of lipoid adrenal hyperplasia. There was an excess of genetic males, possibly due to prevalent socio-cultural factors and gender bias favoring males. There is a need to improve the diagnostic facilities and incorporate a team approach in management of DSD.

Parents' narratives about their experiences of their child's reconstructive genital surgeries for ambiguous genitalia

AIM

The aim of this study was to initiate an exploration of parents' understanding and experiences of their child's reconstructive genital surgeries for ambiguous genitalia.

BACKGROUND

The determination of gender for a child born with ambiguous genitalia is a complex medical and social process influenced by biological, psychological, social and cultural factors. Two main approaches exist; one promotes interventions (optimal gender policy) while the other suggests delaying interventions (informed consent policy) until the child can contribute to the decision.

METHODS

An exploratory narrative inquiry design was chosen. Data were collected through narrative interviews with a purposive non-random sample of 10 parents of eight children (aged 0-11 years) who had ambiguous genitalia.

RESULTS

Parents' stories reflected strong protective instincts towards their children along with feelings of shock and disbelief. Parents' social construction of gender influenced their attitudes and beliefs about their child's ambiguous genitalia and the need for surgery. Parents' desired to be 'good parents' and do what they perceived as 'right' for their child. They considered genital surgery as a necessity primarily relying on medical advice to guide them at times of uncertainty and confusion. Parents rarely shared stories about their child's surgeries/genitalia outside of the couple relationship and these stories were often referred to as 'secrets'.

CONCLUSION

Having a child with ambiguous genitalia was perceived as problematic and brought about changes in roles, responsibilities, goals and social status as a parent beyond those usually associated with parenthood.

RELEVANCE TO CLINICAL PRACTICE

These early findings help increase awareness of parents' experiences and of the problems and emotional challenges that parents face when their child is born with genital ambiguity.

Spontaneous ovulation in a true hermaphrodite with normal male phenotype and a rare 46,XX/47,XXY Klinefelter's mosaic karyotype

BACKGROUND

Most true hermaphrodite patients--characterized by the presence of both ovarian and testicular tissue--demonstrate ambiguous genitalia and are diagnosed at birth, most commonly bearing a 46,XX karyotype.

PATIENT AND METHODS

We report on a 13-year-old boy presenting with left scrotal hemorrhage. He had a left inguinal hernia, a palpable testis in the right, normal male external genitalia and significant gynecomastia. During operation, the left gonad and adjacent tissue were removed for histological examination, which revealed the presence of a normal ovary, rich in follicles and a ruptured corpus luteum, suggestive of spontaneous ovulation, with a normal ipsilateral adnexa and semi-uterus. Biopsy of the right gonad revealed a dysgenetic testicle. Endocrinological assessment postoperatively depicted high FSH, pubertal testosterone and low estradiol levels. Cytogenetic analysis in peripheral blood lymphocytes and FISH of the right gonad revealed a 46,XX (70-60%)/47,XXY (30-40%) karyotype, respectively, while molecular analysis verified the presence of SRY and azoospermia factor genes.

CONCLUSION

The importance of full histological, cytogenetic and molecular investigation and of interdisciplinary approach in every single patient with sex differentiation disorders is highlighted by this rare case of spontaneous ovulation in a true hermaphrodite with normal male external genitalia and Klinefelter mosaicism.

What do the X and Y chromosomes tell us about sex and gender in forensic case analysis?

Sex determination can be particularly crucial in forensic casework such as rape cases or cases of missing persons. Biological traces have to be genetically typed and the classification of the sex is of great importance for further investigations. Lately, several papers were published on reliability of sex determination by genetic typing of amelogenin gene-specific fragments. Problems may arise not only from false detection (or non-detection) of amelogenin-specific fragments, but also in cases of chimerism (bone marrow transplants) or micro chimerism (pregnant women carrying male fetuses), and from the possible discrepancies between the biological gender and the (forensic relevant) legal gender in the personal identity documents. The phenotype based classification of the legal gender may contradict the genetic sex under several conditions as there are genetic diversity, intersex conditions and transsexualism. The forensic relevance of the possible misinterpretation (sex is not necessarily legal gender) should not be underestimated.

Ambigüidade genital: a percepção da doença e os anseios dos pais

OBJETIVOS: identificar a percepção e os mecanismos de enfrentamento utilizados por pais frente à ambigüidade genital de seus filhos em suas diversas etapas evolutivas. MÉTODOS: estudo qualitativo, baseado nos relatos de 15 pais, todos de diferentes famílias, sobre seus anseios no desenvolvimento da criança. Realizado no ambulatório de patologias endócrino-genéticas do Hospital Geral César Cals, no Ceará, em 2004. RESULTADOS: as categorias que emergiram através do discurso dos sujeitos foram: o medo e a ansiedade, e os mecanismos de enfrentamento foram: a negação; a fuga; a regressão/projeção e a racionalização. Observou-se que as tensões e angústias no período neonatal são expressas através do medo da morte, da doença incurável e dos medicamentos. No período infantil, do procedimento cirúrgico (genitália ambígua) e da sexualidade (homossexualismo). Na projeção da fase puberal e adulta há o temor da marginalização, do preconceito, da homossexualidade e da infertilidade. As angústias relatadas foram de quem seria a culpa, a definição sexual (ambigüidade) e a necessidade do segredo. CONCLUSÕES: a genitália ambígua consiste em uma patologia de alta complexidade, que desestabiliza a harmonia psicológica familiar. Nas situações de ambigüidade genital, a detecção e desmistificação dos medos e anseios dos pais devem fazer parte do plano terapêutico.

Mobilização total do seio urogenital para tratamento da genitália ambígua em crianças com hiperplasia adrenal congênita

A abordagem cirúrgica das pacientes com hiperplasia adrenal congênita (HAC) é um desafio e envolve controvérsias. O objetivo deste estudo é avaliar os resultados da correção da genitália em 10 crianças 46 XX com HAC, pela técnica de mobilização total do seio urogenital (MUT), em tempo único. A idade, por ocasião do tratamento cirúrgico, variou de 11 a 78 meses (média= 32 meses) e o seguimento pós-operatório de 15 a 36 meses (média= 26 meses). O aspecto estético foi considerado bom em 7, com uretra e vagina bem exteriorizados no vestíbulo, e satisfatório em 3. Após o acompanhamento médio de 26 meses, a técnica de MUT, por via perineal, sem divisão do reto, se mostrou eficaz para o tratamento da genitália ambígua em crianças com HAC.

A long-term outcome study of intersex conditions

CONTEXT

Clinical management of intersex conditions is controversial because the available evidence is limited and conflicting, with no long-term population based studies comparing matched controls.

OBJECTIVE

To assess the long-term psychological, sexual and social outcomes of patients with intersex compared with two matched control populations.

DESIGN, SETTING AND PARTICIPANTS

Three different aged-matched (18-32 years) patient groups completed a self-administered questionnaire of established quality of life and well-being inventories measuring physical' health, psychological adjustment and sexuality, following a mail-out to all identified patients. The intersex group (n = 50) and the Hirschsprung disease, a congenital disorder, control group (n = 27), were patients who had attended the Royal Children's Hospital, a tertiary centre, for their clinical care. The insulin dependent diabetes mellitus control group was recruited from an adult tertiary hospital. The study was conducted at the hospital-based Murdoch Childrens Research Institute.

MAIN OUTCOME MEASURES

Psychological, sexual and social outcomes.

RESULTS

The intersex group did not differ from controls on physical or mental health, depression, state anxiety, neuroticism, psychoticism or stressful life events. Intersex participants were satisfied with their overall body appearance, although intersex males were less satisfied than controls with the size (p <0.05) and appearance (p <0.01) of their sex organs. The intersex group was less likely to experience orgasm (p <0.05), tended to experience more pain during intercourse (p = 0.06), had more difficulties with penetration (p <0.01) and were less likely to have sexual activity several times or more a week (p <0.05) than the combined control groups. Intersex participants did not differ from controls in level of sexual desire or enjoyment of sexual activities.

CONCLUSIONS

Most patients with intersex had positive psychosocial and psychosexual outcomes, although some problems were reported with sexual activity. These results overall suggest that a model of care including early genital surgery carried out at a centre of excellence with a multidisciplinary team can minimize long-term complication rates.

Hormonal therapies for individuals with intersex conditions: protocol for use

Hormonal therapy forms part of the treatment of every intersex condition. For some conditions, such as salt-wasting congenital adrenal hyperplasia, hormonal replacement therapy is life saving because hormones necessary for survival (cortisol and aldosterone) are replaced. In contrast, other hormones such as androgens or mineralocorticoids are secreted in excessive amounts in congenital adrenal hyperplasia due to an enzyme imbalance, and the role of hormonal therapy is to suppress the unwanted hormone excess by exerting negative feedback. For patients with one of the many causes of hypogonadism, sex hormone replacement therapy may be prescribed to stimulate sexual development: growth of a hypoplastic penis in a young boy, pubertal changes (male or female), psychosexual development, and adult sexual behavior. It has equally important and highly beneficial effects on bone mineral density. Hormonal therapy is also used to treat the unborn child. For the last 20 years, prenatal dexamethasone treatment administered to the pregnant woman has been used to prevent the development of ambiguous genitalia in females with 21-hydroxylase deficiency. Outcome studies show this treatment to be well tolerated and, in general, efficacious. Intersex conditions are, however, difficult to treat because they may intrinsically perturb complex aspects of the person's gender identity, gender-role behavior, sexual orientation, sexual functioning, and psychologic adjustment. Furthermore, decisions made about the sex of an infant by doctors and parents do not always turn out to be correct; the person may grow up feeling uncertain about his or her gender identity, or worse still, harbor a sense of outrage about their life and treatment experiences. Such a person will have definite views about hormonal therapy when the time comes and skillful counseling will be needed. A vigorous debate about ethical aspects of current medical practices relating to intersex conditions has been waged for the last 7 years between certain patient advocacy organizations and the medical profession, and is expected to continue for some time. The quality of the debate will be improved by evidence. The results of a number of long-term follow-up studies have been published, and more are expected. The published studies show mixed, but mainly encouraging, results.

Microcephaly, jejunal atresia, aberrant right bronchus, ocular anomalies, and XY sex reversal

We present a patient with microcephaly, jejunal atresia, aberrant right tracheobronchial tree, mild left blepharoptosis, and corectopia (irregular pupil), left sectoral iris stromal hypoplasia and peripheral anterior synechia, and 46,XY sex reversal. Testosterone and dihydrotestosterone (DHT) levels were within normal limits for a male infant at 3 weeks of age. Gonadectomy at age 18 months revealed immature testis tissue and no evidence of Müllerian structures. PCR amplification of the androgen receptor (AR) gene and flanking genomic regions revealed no evidence for deletion. Array-comparative genomic hybridization (array-CGH) for assessment of gene dosage in other regions of the genome was normal. This patient represents a multiple anomaly disorder similar to intestinal atresia-ocular anomalies-microcephaly syndrome (MIM#243605) but incorporating 46,XY sex reversal with testicular tissue, demonstrating a defect in the sexual differentiation pathway.

Gonadoblastoma in a patient with del(9)(p22) and sex reversal: report of a case and review of the literature

Studies of distinct clinical prototypes have significantly contributed to our understanding of evolutionary abnormalities and their association with neoplasia. We describe a phenotypic female, aged 20 years at report, who was examined as an infant for developmental retardation. The clinical characteristics of the 9p- syndrome were present and the external genitalia were those of a normal female. The karyotype was 46XY,del(9)(p22). The parental karyotypes were normal. No SRY deletion or mutation was detected. Sonography showed the presence of a uterus. Basal luteinizing hormone values were normal; follicle stimulating hormone values were high (40 IU/L). Stimulation with human chorionic gonadotropin did not produce any rise in testosterone. The gonads were removed and histologic analysis disclosed dysgenetic gonads with gonadoblastoma in situ. This case constitutes the fourth case of gonadoblastoma developing in an individual with 9p- syndrome and sex reversal. This and analogous prototypes point to a locus (or loci) on the short arm of chromosome 9, which either constitutes a nonspecific suppressor gene or a gonadoblastoma suppressor gene. An alternative hypothesis would be that a gonad not normally differentiated is more prone to gonadoblastoma development without any specific gene involvement.

The LIM homeobox gene Lhx9 is essential for mouse gonad formation

During mammalian embryonic development, the ovaries and testes develop from somatic cells of the urogenital ridges as indifferent gonads, harbouring primordial germ cells that have migrated there. After sex determination of the gonads, the testes produce testosterone and anti-Mullerian hormone which mediate male sexual differentiation, and the female developmental pathway ensues in their absence. Here we show that transcripts of the LIM homeobox gene Lhx9 are present in urogenital ridges of mice at embryonic day 9.5; later they localize to the interstitial region as morphological differentiation occurs. In mice lacking Lhx9 function, germ cells migrate normally, but somatic cells of the genital ridge fail to proliferate and a discrete gonad fails to form. In the absence of testosterone and anti-Mullerian hormone, genetically male mice are phenotypically female. The expression of steroidogenic factor 1 (Sf1), a nuclear receptor essential for gonadogenesis, is reduced to minimal levels in the Lhx9-deficient genital ridge, indicating that Lhx9 may lie upstream of Sf1 in a developmental cascade. Unlike mice lacking other genes that mediate early stages of gonadogenesis, Lhx9 mutants do not exhibit additional major developmental defects. Thus, LHX9 mutations may underlie certain forms of isolated gonadal agenesis in humans.