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Klinefelter syndrome

Klinefelters syndrom (KS) er en medfødt kjønnskromosomforstyrrelse hos gutter. Tilstanden er svært underdiagnostisert med store individuelle variasjoner. Gutter og menn med tilstanden har nedsatt eller manglende produksjon av mannlig kjønnshormon (testosteron) og spermier Klinefelter syndrome is a common cause for mental retardation of unknown etiology among prepubertal males. Clin Genet 2002; 61: 49-53. PubMed; Hennebicq S, Pelletier R, Bergues U, Rousseaux S. Risk of trisomy 21 in offspring of patients with Klinefelter's syndrome Klinefelter syndrome (KS), also known as 47,XXY is the set of symptoms that result from two or more X chromosomes in males. The primary features are infertility and small poorly functioning testicles. Often, symptoms are subtle and subjects do not realize they are affected. Sometimes, symptoms are more evident and may include weaker muscles, greater height, poor coordination, less body hair. Klinefelters syndrom, også kalt 47,XXY syndrom, er en trisomi som rammer menn. Denne kromosomfeilen kommer av en ekstra versjon av X-kromosomet.Den normale kjønnskromosomkonfigurasjonen til menn er 46,XY. Hos individer med Klinefelters syndrom gir det ekstra X-kromosomet en ekstra mengde arvemateriale i alle cellene i kroppen Klinefelters syndrom er en medfødt kromosomfeil hos menn. Feilen består i at kjønnskromosomparet XY er erstattet med XXY (to kvinnelige og ett mannlig kjønnskromosom). Det ekstra X-kromosomet kommer like ofte med sædcellen som med eggcellen.

XXY Klinefelter syndrom Klikk her for å hente informasjonsbrosjyre om foreningen Klinefelter syndrom i skolesituasjon Undervisningstips for foreldre og lærere Klikk her for å hente informasjonsbrosjyre om skolen Klinefelter syndrom En veiledning for vordende foreldre Klikk her for å hente informasjonsbrosjyre for foreldre. Klinefelter syndro Klinefelter syndrome may adversely affect testicular growth, resulting in smaller than normal testicles, which can lead to lower production of testosterone. The syndrome may also cause reduced muscle mass, reduced body and facial hair, and enlarged breast tissue

Klinefelter syndrome (sometimes called Klinefelter's, KS or XXY) is where boys and men are born with an extra X chromosome. Chromosomes are packages of genes found in every cell in the body. There are 2 types of chromosome, called the sex chromosomes, that determine the genetic sex of a baby Klinefelter syndrome (47, XXY) is a condition that occurs in men who have an extra X chromosome, resulting in an XXY sex chromosome karyotype. The syndrome can affect different stages of language, physical, and social development. It is estimated that 3,000 affected boys are born each year in the US Klinefelter syndrome (KS) is a condition that occurs in males when they have an extra X chromosome.Some males with KS have no obvious signs or symptoms while others may have varying degrees of cognitive, social, behavioral, and learning difficulties

Klinefelter syndrom. Publisert: lör, 2014-07-19 01:03. Barn og graviditet. Klinefelters syndrom innebærer at testiklene slutter å vokse i puberteten. Tekststørrelse. Skriv ut Klinefelters sykdom er den desidert vanligste kromosomfeilen blant gutter Klinefelter syndrome, also known as XXY syndrome, is a condition in boys and men that's caused by an extra X chromosome. It can affect physical and mental development Klinefelter syndrome is a chromosomal condition in boys and men that can affect physical and intellectual development. Most commonly, affected individuals are taller than average are unable to father biological children (infertile); however the signs and symptoms of Klinefelter syndrome vary among boys and men with this condition Kurset er delt inn i fem moduler, med videoforedrag og oppgaver. Her får du innsikt i hvilke utfordringer som er vanlige hos gutter med Klinefelters syndrom We are a NonProfit 501(c)(3) Charitable Organization built to inspire people and families living with Klinefelter syndrome (47 XXY)

Klinefelter Syndrome, XXY, 47XXY, Trisomy X, 47XYY, 48XXXY, 48XXYY, 49XXXXY, X & Y, infertility, ADHD, ADD, behavior, education, support, testosterone, HR Klinefelter syndrome is a common genetic where a male is born with an extra X chromosome. Typically, a male has one X and one Y chromosome. People with Klinefelter syndrome can experience breast growth, breast cancer, osteoporosis, infertility and learning difficulties Klinefelter syndrome and success of sperm retrieval (M. Kulkarni, T Yap. BJUi Knowledge modules, 2018) Click here to view. Fertility management in testicular cancer: the need to establish a standardized and evidence-based patient-centric pathway Klinefelter Syndrome: A Guide for Families What is Klinefelter Syndrome? It is a condition in boys caused by the presence of an extra X chromosome. Boys normally have one X and one Y chromosome, but most boys with Klinefelter syndrome have two X and one Y chromosome. It is relatively common, occurring in about 1 of every 500 baby boys

Klinefelter Syndrome (KS) is a condition that occurs in men who have one or more extra X chromosomes. The syndrome can affect boys and men at different stages of life and their physical, language, and social development Klinefelter syndrome is associated with an increased risk for breast cancer, a rare tumor called extragonadal germ cell tumor, lung disease, varicose veins and osteoporosis. Men who have Klinefelter syndrome also have an increased risk for autoimmune disorders such as lupus, rheumatoid arthritis and Sjogren's syndrome

Background Profile Found - D Klinefelter

Gies I, et al. Management of Klinefelter syndrome during transition. Eur J Endocrinol. 2014; 171:R67-77. Skakkebæk A, et al. Quality of life in men with Klinefelter syndrome: the impact of genotype, health, socioeconomics, and sexual function Klinefelter Syndrome is a genetic mutation, and hence it has no cure but certain pharmacological therapies can be used to treat the clinical manifestations of this disorder. A major concern in patients with Klinefelter syndrome is infertility in men, and although there are no methods available to reverse this, reproduction can still be achieved by directly extracting the sperm from the testis Klinefelter syndrome (KS), also known as XXY syndrome, is a genetic cause of male infertility.Children born with this genetic disease have an extra X chromosome, hence the name. Their karyotype is 47,XXY.. The effects of having an additional chromosome are abnormalities in the normal development of the body, hypogonadism, and male infertility Klinefelter syndrome treatment costs can run into the thousands if surgery or repeated treatments are needed. Klinefelter syndrome is a condition that requires a multidisciplinary treatment approach involving one or more of the following specialists: Pediatricians. Speech therapists. General practitioners. Psychologists and/or psychiatrist Klinefelter syndrome can lead to weak bones (osteoporosis), varicose veins, and autoimmune diseases (when the immune system acts against the body), such as lupus or rheumatoid arthritis. XXY males have an increased risk for breast cancer and cancers that affect blood, bone marrow, or lymph nodes, such as leukemia

Klinefelters syndrom - Framb

Klinefelter syndrome is a common condition, and you — and your son — aren't alone. Ask your doctor about internet resources and support groups that may help answer questions and ease concerns. Men with Klinefelter syndrome. If you have Klinefelter syndrome, you may benefit from these self-care measures: Work closely with your doctor Klinefelter syndrome is a sex chromosome disorder that is a common underlying cause of hypogonadism in men; Epidemiology incidence 1-2.5 per 1000 men only 25-50% of Klinefelter syndrome patients are diagnosed during their lifetimes; risk factors. advanced maternal age; Pathophysiolog Le syndrome de Klinefelter ou 47,XXY est une aneuploïdie qui se caractérise chez l'homme par un chromosome sexuel X supplémentaire. L'individu présente alors deux chromosomes X et un chromosome Y, soit 47 chromosomes au lieu de 46. L'individu est alors de caractère masculin, mais infertile.Sa formule chromosomique s'écrit «47,XXY » Kleinfelter syndrome facts author: John P. Cunha, DO, FACOEP. Klinefelter syndrome, also known as the XXY condition, is a term used to describe males who have an extra X chromosome in most of their cells.; About one of every 500 males has an extra X chromosome, but many don't have any symptoms Klinefelter syndrome is one of the most common chromosome conditions in newborns. It affects between 1 in 500 and 1 in 1,000 newborn males. Variants of the disease with three, four, or more extra.

Klinefelters syndrom - NHI

Mosaic Form Klinefelters'? - YouTube

Klinefelter syndrome is one of the most common chromosomal disorders, affecting 1/500 to 1/1,000 newborn males. Learn more about Klinefelter syndrome, including how it affects men's hormone health and what treatment options are available Klinefelter's Syndrome isn't rare - but it is rarely diagnosed... Klinefelter's Syndrome (KS) is a common congenital condition found in around 1 in 600 live male births, caused by the presence of one or more additional sex chromosomes Klinefelter syndrome, disorder of the human sex chromosomes that occurs in males, one of the most frequent chromosomal disorders in males. It results from an unequal sharing of sex chromosomes soon after fertilization. Learn more about the causes, symptoms, and treatment of Klinefelter syndrome

Klinefelter syndrome results when a boy is born with at least 1 extra X chromosome. This is written as XXY. Klinefelter syndrome occurs in about 1 out of 500 to 1,000 baby boys. Women who get pregnant after age 35 are slightly more likely to have a boy with this syndrome than younger women The American Association for Klinefelter Syndrome Information and Support. The American Association for Klinefelter Syndrome Information and Support (AAKSIS) is a national volunteer association with the mission of education, support, research, and understanding of 47 XXY and its variants, collectively known as Klinefelter syndrome Le syndrome de Klinefelter, décrit en 1942, est lié à une anomalie génétique. Seuls les garçons peuvent être touchés par la maladie, dont les symptômes sont très variables d'un patient à l'autre. Le symptôme constant chez tous les patients est une stéril Klinefelters syndrom (KS) er en tilstand der skyldes en kromosomtalsafvigelse og forekommer kun hos drenge og mænd. Syndromet er opkaldt efter den læge, Harry Klinefelter, der i 1942 først beskrev syndromet.Der er stor usikkerhed omkring hvor mange drenge og mænd, som har denne kromosomtalsafvigelse, men det skønnes at være mellem 1:600 og 1:1.200

Klinefelter syndrome - Wikipedi

Klinefelter syndrome appears to occur more frequently with both older maternal and paternal age (over the age of 35.) A mother who gives birth over the age of 40 is two to three times more likely to have a baby with Klinefelter syndrome than a mother who is age 30 at birth Klinefelter syndrome is a fairly common genetic condition found in males only. Many boys with Klinefelter syndrome — also known as XXY syndrome — have no signs or symptoms, and some don't even know they have it until later in life. The XXY condition that causes Klinefelter syndrome can't be.

Klinefelter syndrome is one of the genetic disorders in males. It occurs when a male baby is born with more than required or extra X chromosomes. Many males consist of one X and one Y chromosome and an extra chromosome can cost a male with physical traits which are inappropriate for males. Klinefelter syndrome is found in 1 out of 1000 males Klinefelter's Syndrome (KS) is a sex chromosomal disorder like Turner's syndrome. While KS individuals have an extra X chromosome making the total number of chromosomes 47 in number, a person. Klinefelterov sindrom (KS) ili Klinefelter-Reifenstein-Albrightov sindrom, poznat i kao 47, XXY je hromosomopatija koja uključuje skup simptoma koji proizlaze iz dva ili više X hromosoma kod muškaraca. [1] Primarne karakteristike su neplodnost i mali, slabo funkcionirajući testisi. [1] [2] Često simptomi mogu biti suptilni pa mnogi ljudi i ne shvataju da su pogođeni Klinefelter syndrome is caused by an additional X chromosome in males (47,XXY). Clinical findings are nonspecific during childhood; thus, the diagnosis commonly is made during adolescence or.

File:Klinefelter's syndrome

Klinefelters syndrom - Wikipedi

  1. Klinefelter syndrome can be diagnosed through genetic testing, semen analysis and blood tests to measure hormones. Treatments Treatment with testosterone and/or a medicine to prevent excess estrogen production may be given to help normalize secondary sexual development and improve libido, strength, mood and thinking
  2. Klinefelter syndrome is the presence of two or more X chromosomes plus one Y, resulting in a phenotypic male. Diagnosis is based on clinical findings and is confirmed by cytogenetic analysis. Treatment may include testosterone supplementation. (See also Overview of Chromosomal Anomalies.
  3. Klinefelter Syndrome Definition Klinefelter syndrome is a chromosomal disorder that affects only males. People with this condition are born with at least one extra X chromosome. The syndrome was first identified and described in 1942 by Harry Fitch Klinefelter, Jr., an American physician. Description Klinefelter syndrome is a condition in which one or.
  4. Klinefelter syndrome is a hereditary disorder which occurs when a baby boy is born with an additional copy of the X chromosome. It is amongst the most frequent hereditary diseases affecting men. The disease adversely affects growth of the testicles due to which the size of testicles is smaller than normal
  5. 1 Le syndrome l Qu'est-ce que le syndrome de Klinefelter ? Décrit pour la première fois en 1942 par Harry F. Klinefelter, le syndrome de Klinefelter est dû à une anomalie chromosomique présentant une grande variabilité d'expression avec u

Klinefelters syndrom - Store medisinske leksiko

Klinefelter syndrome, 47, XXY, or XXY syndrome is a genetic disorder where people have an extra number of X chromosomes. People who have Klinefelter's Syndrome are often called XXY Males, or 47, XXY Males Living with XXY became a NonProfit 501(c)(3) Charitable organization on November 6th, 2019. We have a new Website. Come follow the journey. https://livingwit.. Klinefelter Syndrome. Klinefelter's syndrome includes increased levels of serum and urinary gonadotropins, small testes with fibrosis and hyalinization of the seminiferous tubules, and impairment of function and clumping of Leydig cells Klinefelter syndrome is a congenital condition in which males are born with one or more extra X chromosomes. It is not inherited. Klinefelter syndrome is common, affecting one in every 450 men. But most people with Klinefelter syndrome don't know they have it and have never received treatment Klinefelter syndrome can cause problems with learning and sexual development in guys. It's a genetic condition (meaning a person is born with it). Klinefelter syndrome only affects males. It happens because of a difference deep inside the body's cells, in microscopic strings of DNA (what make up.

Professor Rob McLachlan discusses Klinefelter syndrome, and how it can present differently in each individual but a common feature is that all men with Kline.. Wir (die Deutsche Klinefelter-Syndrom Vereinigung e.V. - DKSV e.V.) sind eine 1992 gegründete, ehrenamtlich aktive Selbsthilfe-Organisation auf Bundesebene mit ca. 500 Mitgliedern. Unser Ziel ist es, Menschen mit Klinefelter-Syndrom (47,XXY), den seltenen Erkrankungen 48,XXXY-Syndrom und 49,XXXXY-Syndrom sowie deren Angehörige zu unterstützen Das Klinefelter-Syndrom kommt oft erst in der Pubertät zutage - vorher sind die Symptome meistens so schwach ausgebildet, dass sie kaum auffallen und die Abweichung der Geschlechtschromosomen zunächst unbemerkt bleibt. Symptome, die jeder Klinefelter-Syndrom-Betroffene aufweist, sind eine Unterentwicklung der Hoden und eine verminderte Produktion des männlichen Sexualhormons Testosteron

Klinefelter

1 Definition. Das Klinefelter-Syndrom gehört zu den numerischen Chromosomenaberrationen und ist durch überzählige X-Chromosomen bei männlichem Karyotyp gekennzeichnet.. 2 Genetik. Die Mehrzahl der Betroffenen (ca. 80 %) weist den Karyotyp 47, XXY auf. Bei den verbleibenden Fällen finden sich Mosaikformen mit Karyotypen wie beispielsweise 46, XY / 47, XXY Klinefelter syndrome causes, facts, karyotype and chromosome, diagnosis, treatment. If you or your son has been diagnosed with Klinefelter syndrome, you might find it useful to find out more about it and get in touch with others affected by it

Klinefelter syndrome - Symptoms and causes - Mayo Clini

Klinefelter syndrome can affect both physical and cognitive development. According to the National Human Genome Research Institute, Klinefelter syndrome is found in about 1 out of every 500 to. Klinefelter-Syndrom ist die Bezeichnung für eine Fehlverteilung der Geschlechtschromosomen. Es betrifft ausschließlich Männer und ist gekennzeichnet durch ein überzähliges X-Chromosom. Die Ausprägung der Symptome ist sehr variabel. Nicht in allen Fällen ist daher eine Behandlung notwendig beim Auftreten des Klinefelter-Syndroms

Klinefelter's Syndrome - CRASH! Medical Review Series

Klinefelter syndrome males may experience some of the following learning and language-related challenges (Many of the language and learning difficulties can often lead to social and behavioral symptoms in Klinefelter syndrome): A delay in learning to talk. Difficulty using language to express their thoughts and needs Klinefelter's syndrome is the most common genetic cause of human male infertility, but many cases remain undiagnosed because of substantial variation in clinical presentation and insufficient professional awareness of the syndrome itself. Early recognition and hormonal treatment of the disorder can substantially improve quality of life and prevent serious consequences

Klinefelter syndrome - NH

Klinefelter syndrome occurs when a male is born with an extra X chromosome. Thus a male with Klinefelter has XXY instead of the usual XY pair. Because males with this condition produce less of the male hormone testosterone than other males, they are less masculine-looking than their peers Men with Klinefelter syndrome may produce lower amounts of testosterone than usual and will not generally be able to conceive naturally as the testicles produce little or no sperm. New techniques are being developed to extract sperm from the testicles to help with artificial conception methods, which may help in some circumstances

Klinefelter's syndrome is a genetic condition affecting boys and men that occurs as a result of the presence of one or more extra X chromosomes. The condition is typically characterised by tall stature, reduced fertility and development of breast tissue, although some patients have no clinical features other than reduced or absent sperm count Klinefelter syndrome can cause problems with learning and sexual development in guys. It's a genetic condition (meaning a person is born with it). Klinefelter syndrome only affects males. It happens because of a difference deep inside the body's cells, in microscopic strings of DNA (what make up genes) called chromosomes

14 Famous People With Klinefelter Syndrome or Marfan

  1. Klinefelter syndrome is a chromosomal condition in boys and men that can affect physical and intellectual development. Most commonly, affected individuals are taller than average are unable to father biological children (infertile); however the signs and symptoms of Klinefelter syndrome vary among boys and men with this condition. In some cases, the features of the condition are so mild that.
  2. Klinefelter's syndrome, characterised by a 47, XXY chromosomal pattern, has largely been associated with physical abnormalities. Here, we report high levels of schizophrenia-spectrum pathology in 32 men with this syndrome in comparison with 26 healthy controls
  3. What is Klinefelter's syndrome? Klinefelter's syndrome is the clinical result of an additional X chromosome in males (47,XXY), although other chromosome abnormalities (such as 46,XY/47,XXY mosaicism; 48,XXXY; 49,XXXXY) account for 10-20% of cases.1 2 Classic clinical findings include infertility, small testes, hypergonadotropic hypogonadism (elevated luteinising hormone and follicular.
  4. Klinefelter′s syndrome is a genetic condition where the male has an extra X chromosome (XXY) making the total number of chromosomes 47 instead of 46 in healthy males (XY). This chromosome constitution (karyotype) occurs in 1 in 500, to 1 in1000 live male births

Klinefelter Syndrome (47, XXY) is a chromosomal variation in males in which one extra X chromosome is present, resulting in a 47,XXY karyotype. The extra X chromosome typically affects physical, neurodevelopmental, behavioral, and neurocognitive functioning Klinefelter syndrome, also known as XXY syndrome, is a genetic disorder that involves an additional X sex chromosome in males. Physiologically, males inherit one X chromosome from their mothers. Klinefelter syndrome is a genetic condition but it is not inherited. It is caused by a random event during cell division early in fetal development. The syndrome is linked to an abnormal number of sex chromosomes. Typically, males have an X and a Y chromosome, and females have two X chromosomes Klinefelter Syndrome is the most common cause of hypogonadism, a condition that stops your body from producing sperm and testosterone.. Testosterone is the major androgen (male sex hormone) in your body, as you need it for normal reproductive and sexual function What is Klinefelter syndrome? It is a condition in boys caused by the presence of an extra X chromosome. Boys normally have one X and one Y chromosome, but most boys with Klinefelter syndrome have two X and one Y chromosome. It is relatively common, occurring in about 1 of every 500 baby boys

Klinefelter's syndrome pathophysiology - wikidoc

Klinefelter syndrome is the most common sex chromosome disorder in males. Variation in clinical presentation and insufficient awareness of this syndrome among clinicians lead to fifty percent of. Famous People With Klinefelter Syndrome. Two of the most famous people that suffered from klinefelter syndrome were George Washington artist Lili Elbe. Living With Klinefelter Syndrome. In the video below, Matt who has XXY Klinefelter Syndrome, talks about what he goes through on a daily basis Klinefelter syndrome is a genetic condition affecting males, and it often isn't diagnosed until adulthood, results when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome may adversely affect testicular growth, resulting in smaller than normal testicles, which can lead to lower production of testosterone

Klinefelter Syndrome - YouTube

Klinefelter syndrome babies are quieter and less demanding than other babies. As they grow older, they develop into less confident, less active, and shy individuals, who find it difficult to cope up with or fit in with children their age Klinefelter syndrome happens when a male is born with an additional X chromosome. This results in smaller-sized testicles, low testosterone levels, and possibly infertility. Complications include. Klinefelter Syndrome (KS) En Español. KS describes a set of physical, language, and social development symptoms in males who have an extra X chromosome. Its main feature is infertility. Outward signs of KS can be subtle, so symptoms often are not recognized, and may not be treated in a timely manner

Klinefelter Syndrome diagnosis overcome with sperm donationKlinefelter's syndrome & IVF Techonlogies - YouTubeCelebrities with Klinefelter Syndrome

Klinefelter syndrome Genetic and Rare Diseases

Purpose: We examined preoperative factors that could predict successful microdissection testicular sperm extraction in men with azoospermia and nonmosaic Klinefelter's syndrome. We also analyzed the influence of preoperative hormonal therapy on the sperm retrieval rate. Materials and methods: A total of 91 microdissection testicular sperm extraction attempts were done in 68 men with nonmosaic. Klinefelter's syndrome arises due to an extra X chromosome. This extra chromosome arises from the accidental retention of a chromosome during a non-disjunction event during paternal and maternal Meiosis I (Gametogenesis). Klinefelter's syndrome can be detected via prenatal diagnosis

Klinefelter syndrom ALTOMHELSE

Klinefelter syndrome A syndrome with a 47, XXY chromosome complement, in which the subjects are phenotypically male but have seminiferous tubule dysgenesis, elevated plasma and urinary gonadotropins, variable gynecomastia, eunuchoid habitus and possibly female secondary sex characteristics Klinefelter syndrome is a genetic disorder associated with male hypogonadism, gynecomastia and reduced fertility. Other symptoms include erectile dysfunction, osteoporosis, language and learning impairment and behavioral problems. Klinefelter Syndrome (Klinefelters Syndrome): Read more about Symptoms, Diagnosis, Treatment, Complications, Causes and Prognosis Turners syndrom er en medfødt sykdom som skyldes feil i kroppens arvemateriale, der det ene av de to kjønnskromosomene helt eller delvis mangler. Tilstanden rammer bare jenter. Genfeilen fører til mangelfull utvikling av eggstokkene og østrogenmangel når de kommer i puberteten There are several support groups options for individuals with Klinefelter syndrome and their loved ones. Listed below are a few of the ones available. The Focus Foundation; Association for X and Y Chromosome Variations; Klinefelter Syndrome Information and Suppor Turners syndrom er en medfødt tilstand hos jenter som kjennetegnes av lav slutthøyde og manglende pubertetsutvikling. En del fysiske trekk går igjen, og hjerte-, kar- og nyremisdannelser forekommer hyppigere enn i befolkningen ellers. Mental utvikling er normal, men spesifikke lærevansker kan forekomme

Klinefelter Syndrome: Symptoms, Causes, Diagnosis, and

Klinefelter syndrome (KS) is the most common X chromosome abnormality encountered in men with infertility. The classic form 47,XXY accounts for 80-90% of cases Klinefelter syndrome: Expanding the phenotype and identifying new research directions. Genetics in Medicine, 5(6), 460-468. Plotton, I., Brosse A., & Lejeune, H. (2010). Is it useful to modify the care of Klinefelter's syndrome to improve the chances of paternity? Annales d'endocrinologie (Paris), 71(6), 494-504. French Klinefelter syndrome: Introduction. A rare chromosomal genetic syndrome where the person has XXY chromosomes instead of XY or XX. The person is usually male because of the Y chromosome, but has lower levels of testosterone and may have some female-like features (because there are two X chromosomes)

Klinefelter syndrome is a condition that occurs as a result of an extra X chromosome during the formation of either a sperm or an egg cell Klinefelter Syndrome often referred to as XXY trisomy, XXY syndrome, and Klinefelter's Syndrome is a chromosomal disorder exclusively associated with males having one or more of the X chromosome than the normal 'XY' pattern Klinefelter Syndrome Definition. Klinefelter syndrome is a chromosomal disorder that affects only males. People with this condition are born with at least one extra X chromosome.The syndrome was first identified and described in 1942 by Harry Fitch Klinefelter, Jr., an American physician Klinefelter Syndrome Symptoms. There are varying symptoms and degrees of severity which may occur in males with Klinefelter syndrome. The manifestations exhibit depending on the number of XXY cells that the male has, the age his condition was diagnosed, and the amount of testosterone in the body Klinefelter syndrome (KS) is the most frequent chromosome disorder in males (1:650 newborn males), defined by 47,XXY karyotype. The classical phenotype is that of a tall male with relatively long legs, small, firm testes and gynecomastia. Azoospermia and infertility are almost inevitably present, bu

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