21. Hospital Practice Klinefelter Syndrome Many physicians underestimate the prevalence of klinefelter syndrome and so fail to recognize its more obvious features. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

22. Understanding Klinefelter Syndrome American Association for klinefelter syndrome Information and Support (AAKSIS) http://www.aaksis.org/bock.cfm

skip navigation links TOP AAKSIS Library About AAKSIS Contact Education Home ... Visitor Center b UNDERSTANDING KLINEFELTER SYNDROME A GUIDE FOR XXY MALES AND THEIR FAMILIES Written by: Robert Bock Office of Research Reporting, NICHD NIH Pub. No. 93-3202 August 1993 CONTENTS What is Klinefelter Syndrome? Chromosomes and Klinefelter Syndrome Causes Diagnosis ... Adulthood WHAT IS KLINEFELTER SYNDROME? Top In 1942, Dr. Harry Klinefelter and his coworkers at the Massachusetts General Hospital in Boston published a report about nine men who had enlarged breasts, sparse facial and body hair, small testes, and an inability to produce sperm. By the late 1950s, researchers discovered that men with Klinefelter syndrome, as this group of symptoms came to be called, had an extra sex chromosome, XXY instead of the usual male arrangement, XY. (For a more complete explanation of the role this extra chromosome plays, see the accompanying section, "Chromosomes and Klinefelter syndrome." In the early 1970s, researchers around the world sought to identify males having the extra chromosome by screening large numbers of newborn babies. One of the largest of these studies, sponsored by the National Institute of Child Health and Human Development (NICHD), checked the chromosomes of more than 40,000 infants. Based on these studies, the XXY chromosome arrangement appears to be one of the most common genetic abnormalities known, occurring as frequently as 1 in 500 to 1 in 1,000 male births. Although the syndrome's cause, an extra sex chromosome, is widespread, the syndrome itself-the set of symptoms and characteristics that may result from having the extra chromosome-is uncommon. Many men live out their lives without ever even suspecting that they have an additional chromosome.

23. AAKSIS Email list, conference, membership, newsletter, regional groups and resource links. http://www.AAKSIS.org/

skip navigation links About AAKSIS Contact Education ... Visitor Center b Information Understanding Klinefelter Syndrome : A Guide for XXY Males and their Families, by Robert Bock, Office of Research Reporting, NICHD. NIH Pub. No. 93-3202 August 1993. A Spanish translation of the complete "Understanding Klinefelter Syndrome: A Guide for XXY Males and Their Families," by Robert Bock. About 47XXY/Klinefelter Syndrome , the AAKSIS introductory Brochure. The complete AAKSIS Introductory Brochure is also available for download: 151K Adobe Acrobat PDF document . The brochure may be printed out and distributed. Klinefelter Syndrome - What to expect, how to respond? by Wolfram E. Nolten, M.D. F.A.C.P. University of Wisconsin Medical School Dr Nolten gives a broad overview of the syndrome based on his reading of current research. Announcement For anyone who has been approached to participate in a study being conducted by researcher@klinefelter-xxy.org , please click here Studies Brain-imaging study at the NIMH Sex Chromosome Tetrasomy and Pentasomy , by Bruce G. Bender, PhD; Mary G. Linden, MS; Arthur Robinson, MD. This 59K document (without graphics) is courtesy of the National Jewish Medical and Research Center Transdermal Testosterone Gel Improves Sexual Function, Mood, Muscle Strength, and Body Composition Parameters in Hypogonadal Men

24. Genetic Conditions / Rare Conditions Information Site Joubert syndrome. Kabuki syndrome. Kidney conditions. klinefelter syndrome (see chromosome syndromes) KlippelFeil syndrome. Klippel-Trenaunay http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

25. Klinefelter Syndrome klinefelter syndrome resources, national and international support groups, clinics with genetic counselors and geneticists. http://www.kumc.edu/gec/support/klinefel.html

Klinefelter syndrome PO Box 119 Roseville, CA 95678-0119 Phone: 916.773.1449 Fax: 916.773.1449 E-mail: help@genetic.org Web site: http://www.genetic.org/ks/ Japenese version) Resources for families Introductory video about XXY , by mother whose son has Klinefelter Syndrome - The Even Exchange, Newsletter American Association for Klinefelter Syndrome Information and Support (AAKSIS) Klinefelter Syndrome Support Group Home Page numerous links to other organizations and resources, created by an adult with Klinefelter Syndrome, regional groups, varients, international groups International Groups: Australia Australian Klinefelter Support Group 4 Victoria Rd Acquire Fields NEW 02564 AUSTRALIA Victoria Support Group 41 Jesmond Rd Cordon, Victoria 03136 AUSTRALIA Klinefelter Syndrome Support Group P.O.Box 3 Glendenning Mail Center NEW 2761 AUSTRALIA Canada Canada Klinefelter Support Group Apt. 3, 2867 Young St. Toronto, ON. Canada M4N 2J5 England (United Kingdom) Klinefelter's Syndrome Association 56 Little Yeldham Road Little Yeldham, Halstead, Essex CO9 4QT

26. Klinefelter's Syndrome Association - Your First Port Of Call For Klinefelter Syn klinefelter syndrome Association Members on one of our successful Activity Welcome to the homepage for the Klinefelter s Syndrome Association (UK). http://www.ksa-uk.co.uk/

Klinefelter's Syndrome Association UK Charity Number 1058319 (Keywords: XXY, 47XXY Klinefelter) KS Info News KS Facts Education Medical ... Gallery KSA Info Membership Conference Research Publications ... Home Under Construction Adults Teens Parents Wives Senior Citizens Welcome Members on one of our successful Activity Weekends in Derbyshire, UK. Welcome to the homepage for the Klinefelter's Syndrome Association (UK). There could be many reasons for you arriving at this page; it may be you know all about Klinefelter's Syndrome (KS) and are just browsing, in which case, feel free to do so. However, you or someone close to you may have recently been diagnosed with KS and are searching for help, information or advice. All our members have once been in the same position, in fact that's why we started! We hope that within these pages you find what you are looking for, we regularly update the site with new information. If you want more, feel free to contact us , we have a range of resources, or you may wish to speak to one of our members. Take time to find out about us and what we have to offer, consider becoming a

27. XXY Information Klinefelter Syndrome Medical information, news, and links. http://www.47xxy.org/XXYframe.html

Clicking the above logo anywhere on this site will take you to the bottom of the page where you will find a Table of Contents. All fonts are adjustable - use your browser settings. No tracking methods, such as Cookies, Web-beacons, or Web-bugs, are used on this Web-site.

28. Klinefelter Syndrome / Family Village klinefelter syndrome and Associates has a mission to enhance the quality of Understanding klinefelter syndrome A Guide for XXY Males and Their Families http://www.familyvillage.wisc.edu/lib_klin.htm

Klinefelter Syndrome Who to Contact Where to Go to Chat with Others Learn More About It Web Sites ... Search Google for "Klinefelter Syndrome" Who to Contact Klinefelter Syndrome and Associates 11 Keats Court Coto de Caza, CA 92679 888-999-9428 (toll-free) http://www.genetic.org/ks/ Klinefelter Syndrome and Associates has a mission to enhance the quality of KS individuals' lives by assisting in their right of early diagnosis and treatment. They work together to insure KS individuals are treated with dignity. They are advocates for KS individuals and families through active participation in the professional, educational, and research communities at national, state, and local levels. KSA fosters mutual support and create an environment conducive to open communication among our membership. Where to Go to Chat with Others 49variant · The 49ers Group This is a list available only to those parents who have a son with the 49 variant. This list has been formed to provide support, education and information. It is a restricted list and members must be approved by the moderator. AAKSIS The AAKSIS E-Mail List has been formed to provide discussion, support, and fellowship for the international community of those medically diagnosed as being XXY (and variants), or having Klinefelter Syndrome, their supporters, family members, spouses, medical, and psychological advisors.

29. Dr. Koop - Klinefelter Syndrome A chromosome abnormality that affects only men and causes hypogonadism. http://www.drkoop.com/ency/article/000382.htm

Home Health Reference Klinefelter syndrome Jul 29, 2005 Search: Dr.Koop MEDLINE Diseases Symptoms Procedures Natural Medicine ... Drug Library Inside DrKoop News Archive Animations Health Videos Health Tools ... Newsletters Klinefelter syndrome Injury Disease Nutrition Poison ... Prevention Klinefelter syndrome Definition: Klinefelter syndrome is a chromosome abnormality that affects only men and causes hypogonadism Alternative Names: 47 X-X-Y syndrome Causes, incidence, and risk factors: A person's sex is determined by the X and Y chromosomes. Normally, men have an X and a Y and women have two X's. In Klinefelter syndrome, a male has two X's and a Y. The condition is common and affects 1 in 500 men. The infant appears normal at birth, but the defect usually becomes apparent in puberty when secondary sexual characteristics fail to develop (or develop late). At this time, testicular changes occur that eventually result in infertility in the majority of those affected. Some mild cases may go undetected, with no abnormalities present except infertility. One risk factor for this condition is the mother giving birth at an older age. In most cases, the problem develops during fetal development and is not inherited from one or both parents.

30. Hospital Practice: Klinefelter Syndrome Many physicians underestimate the prevalence of klinefelter syndrome and so fail klinefelter syndrome is one of the most common causes of hypogonadism, http://www.hosppract.com/issues/1999/0915/cesmyth.htm

Diagnosis and Treatment of Klinefelter Syndrome CYNTHIA M. SMYTH University of Washington Many physicians underestimate the prevalence of Klinefelter syndrome and so fail to recognize its more obvious features. Increased awareness of its effects on physical, psychological, and social development should help to dispel persistent misconceptions about the condition and enable earlier diagnosis and more effective treatment. Dr. Smyth is in private practice and is also Clinical Instructor, Department of Internal Medicine, University of Washington, Seattle. Klinefelter syndrome is one of the most common causes of hypogonadism, affecting one in 500 men and boys. In two thirds of cases, the chromosomal karyotype is 47,XXY; in the remainder, variant and mosaic karyotypes predominate (Figure 1). Expression of the syndrome varies with the number of X chromosomes and the degree of endocrinologic dysfunction. The patient's history and physical examination provide enough information to diagnose the condition in puberty, but most patients do not seek medical attention until adulthood, when problems such as impotency or infertility become an issue. The following case is typical. Case Presentation A 44-year-old man presented to his primary care physician complaining of erectile dysfunction and infertility. Although he and his wife were able to have intercourse, they had been unable to have children. On questioning, he said that he was aware that he did not have the same libido as many of his friends. He had gone through puberty late and had not begun to shave until age 17. He had had academic, psychological, and social difficulties as a teenager and had been treated for depression as an adult. He had not had major medical problems such as high blood pressure or diabetes and did not drink or smoke.

31. XXY Information Klinefelter Syndrome A medical and information site for klinefelter syndrome, XXY, and variants. http://47xxy.org/

ENTER Clicking the above logo anywhere on this site will take you to the bottom of the page where you will find a Table of Contents. All fonts can be adjusted - use your browser settings. London, Ontario, Support Group Meeting, Saturday, October 16, 2005. For more information please click here : The information and reference materials contained on this site are intended solely for the information of the reader. They should not be used for treatment purposes, but rather for discussion with the patient's own physician.

32. Klinefelter Syndrome - Womens Health And Medical Information On MedicineNet.com Women s Health information covers breast, cancer, heart, pregnancy, sexual health, and mature women related conditions. http://www.medicinenet.com/klinefelter_syndrome/article.htm

document.writeln(''); MedicineNet Home Women's Health Home Page > Klinefelter Syndrome Search Tips Printer-Friendly Format FREE Newsletters Email to a Friend ... Next Klinefelter Syndrome Medical Author: Frederick Hecht, MD, FAAP, FACMG What is Klinefelter syndrome? What causes Klinefelter syndrome? What is XXY? What causes XXY? How common is Klinefelter syndrome? Who are XXY males? What problems do XXY males have? How is the diagnosis of XXY made? When is the diagnosis of XXY typically made? What information concerning an XXY boy should parents share with others? What should an XXY boy be told? What are XXY boys like in childhood? How can language problems be detected early? What guidelines can be used to detect language problems? How do XXY boys perform at school? How can educational laws help an XXY boy at school? How can educational laws help a younger XXY boy? How can an XXY boy be helped to learn? What are XXY boys like in adolescence? Is testosterone treatment advisable for XXY males? What are the possible side effects of testosterone treatment? Are there variations of the XXY chromosome complement?

33. Womens Health And Medical Information On MedicineNet.com Terms Related to klinefelter syndrome. XXY Chromosomes; XXY Males klinefelter syndrome Related Doctor s Views Updates http://www.medicinenet.com/klinefelter_syndrome/

document.writeln(''); MedicineNet Home Women's Health Home Page Search Tips What's Inside the Klinefelter Syndrome Health Center Klinefelter Syndrome Main Article 2 Doctor's Views related to Klinefelter Syndrome 1 Health Features related to Klinefelter Syndrome Klinefelter Syndrome RSS feed Our Klinefelter Syndrome Main Article provides a comprehensive look at the who, what, when and how of Klinefelter Syndrome Women's Health Women's Health - Covering the Basics Join the discussion on the Women's Health Message Boards Klinefelter Syndrome related Doctor's Views Doctor: Getting the Most from Your Doctor’s Appointment How to Choose a Doctor Klinefelter Syndrome related Health Features Doctor: Checklist to Take To Your Doctor's Appointment Terms related to Klinefelter Syndrome: XXY Chromosomes; XXY Males Medications MedTerms Medical Dictionary Home Help ... Women's Health Home Page Allergies Alzheimer's Arthritis Asthma Blood Pressure Cancer Cholesterol Chronic Pain Crohn's Disease Depression Diabetes Dictionary Digestion Eyesight First Aid Healthy Kids Healthy Living Heart Hepatitis C HIV/AIDS Liver Lung Cond.

34. Introduction: Klinefelter Syndrome - WrongDiagnosis.com Introduction to klinefelter syndrome as a medical condition including symptoms, diagnosis, misdiagnosis, treatment, prevention, and prognosis. http://www.wrongdiagnosis.com/k/klinefelter_syndrome/intro.htm

Home Symptoms Diseases Risks ... Diseases Search our medical database Subscribe to our free Newsletter sample Send this page to a friend Condition Lists By Organ By Symptom By Class By Prevalence ... List A-Z Current chapter: Klinefelter syndrome Next sections Basic Summary for Klinefelter syndrome Prevalence and Incidence of Klinefelter syndrome Types of Klinefelter syndrome Symptoms of Klinefelter syndrome ... Diagnostic Tests for Klinefelter syndrome Next chapters: Jacobs syndrome Triple-X syndrome Androgen Insensitivity Syndrome Congenital conditions ... Feedback Introduction: Klinefelter syndrome Klinefelter syndrome: 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). Sterility is a possible complication. The rarer subtype XXXY syndrome may lead to retardation. Researching symptoms of Klinefelter syndrome: Further information about the symptoms of Klinefelter syndrome is available including a list of symptoms of Klinefelter syndrome , or alternatively return to research other symptoms in the symptom center Treatments for Klinefelter syndrome: Various information is available about treatments available for Klinefelter syndrome , or research treatments for other diseases.

35. Basic Summary For Klinefelter Syndrome - WrongDiagnosis.com Overview of klinefelter syndrome as a medical condition including introduction, prevalence, prognosis, profile, symptoms, diagnosis, misdiagnosis, http://www.wrongdiagnosis.com/k/klinefelter_syndrome/basics.htm

Home Symptoms Diseases Risks ... Klinefelter syndrome Search our medical database Subscribe to our free Newsletter sample Send this page to a friend Condition Lists By Organ By Symptom By Class By Prevalence ... List A-Z Current chapter: Klinefelter syndrome Next sections Prevalence and Incidence of Klinefelter syndrome Types of Klinefelter syndrome Symptoms of Klinefelter syndrome Diagnostic Tests for Klinefelter syndrome ... Complications of Klinefelter syndrome Next chapters: Jacobs syndrome Triple-X syndrome Androgen Insensitivity Syndrome Congenital conditions ... Feedback Basic Summary for Klinefelter syndrome Main name of condition: Klinefelter syndrome Other names or spellings: XXY males, XXY syndrome What is Klinefelter syndrome? Brief description of Klinefelter syndrome: Rare chromosome XXY syndrome. Parent types of Klinefelter syndrome: Sex chromosome conditions Intersex conditions Y Chromosome Disorders X Chromosome Disorders Organs Affected by Klinefelter syndrome: chromosome x chromosome y chromosome sex chromosomes Types of Klinefelter syndrome: XXXY syndrome How many people get Klinefelter syndrome?

36. Klinefelter Syndrome klinefelter syndrome is a chromosome disorder in males. klinefelter syndrome is one of the most common chromosomal abnormalities. http://www.healthatoz.com/healthatoz/Atoz/ency/klinefelter_syndrome.jsp

37. Klinefelter's Syndrome - Preliminary Draft According to Tournaye et. al. the incidence of klinefelter syndrome in the Because Klinefelter s Syndrome is a sexual disorder, its effects are not http://srv2.lycoming.edu/~newman/courses/bio22298/disorderpapers/Klinefelters/pr

Klinefelter's Syndrome There is a wide variety of symptoms of which any number may be expressed with varying severity. They include lack of secondary sexual characteristics, development of female characteristics, infertility, language impairment, and mental retardation. Mental retardation can be caused by Klinefelter Syndrome, but not in the usual 47, XXY karyotype. Instead, it results from multiple aneuploidies such as 48, XXXY; 48, XXYY; and 49, XXXXY (Robinson et. al., 1994). These individuals generally demonstrate more cognitive and behavioral problems, and therefore, can not be considered simultaneously with the more common 47, XXYcases (Utah Department of Health, 1993). Another possible variant is a mosaic individual which means that he possesses two or more different cell lines differing in the number of chromosomes (Robinson et. al., 1994). A mosaic Klinefelter male, which is much less common than the other types, would have a 46, XY/47, XXY karyotype. Klinefelter syndrome in these individuals can be more or less severe, depending on which cell line is used for the symptomatic traits. The prognosis for Klinefelter patients is bright in some areas and unclear in others. To deal with the lack of secondary sexual features and other problems caused by low quantities of testosterone, there is testosterone therapy. Testosterone should be administered starting at eleven to twelve years of age, when puberty normally begins. The benefit is a more normal appearance including weight gain, increased muscle mass, increased hair distribution, acne, and less feminization (Slywka, 1994). If the syndrome is diagnosed later in life, testosterone treatmentsshould still be helpful and effective and usually increase sex drive. These treatments are available in oral, injectable, and patch therapy form. If gynecomastia is already prevalent, breast reduction surgery is a feasible option.

38. Klinefelter Syndrome klinefelter syndrome is a chromosome abnormality that affects only men and causes . http://www.healthcentral.com/ency/408/000382.html

Dr. Dean TV Specials Newsletters Home ... Health Tools Search Choose a Health Topic * All Health Topics * Acne Addictions AIDS/HIV Alcohol Abuse Allergies Alternative Medicine Alzheimer's Arthritis Asthma Attention Deficit Disorder (ADHD) Backache Bipolar Affective Disorder Birth Control Blood Blood Pressure Bone/Joint/Tendon Bowel Brain Breast cancer Cancer Cerebral Palsy Cholesterol Cramps Crohn's Disease Cysts Dental/Oral Depression Diabetes Diet, Fitness, Looks Disabled/Special Needs Drug Abuse Ear/Nose/Throat Eating/Appetite Eczema Encephalitis Eye/Vision Fatigue Fever Flu Food Poisoning Foot Gallbladder Gastrointestinal Genetic/Congenital GERD/Heartburn Hair Loss Hair/Scalp Headache Hearing Heart Disease, Stroke Heat/Sunstroke Hepatitis Hernia Herpes High Blood Pressure Hormonal Immune Disorders Immunizations/Vaccines Impotence Incontinence/Bladder Infections Injuries Kidney/Urinary Kids Learning Disabilities Liver Lung Cancer Men Menopause, Postmenopause Migraine Mobility/Balance Multiple Sclerosis Muscle Neural Nosebleeds Pain Parasites Pituitary PMS Pregnancy Prostate Cancer Prostate Disorders Psoriasis Psychological Raynaud's Disease Respiratory Reye Syndrome Rheumatoid Arthritis Schizophrenia Seniors Sensory Sexually Transmitted Disease Skin Sleep Speech Disorders Spinal Thyroid Trauma Weight Loss Women Yeast Infections Home Health Encyclopedia Klinefelter syndrome Klinefelter syndrome Injury Disease Nutrition Poison ... Prevention Klinefelter syndrome Definition: Klinefelter syndrome is a chromosome abnormality that affects only men and causes hypogonadism Alternative Names: 47 X-X-Y syndrome

39. Dr. Koop - Klinefelter Syndrome klinefelter syndrome is a chromosome abnormality that affects only men and causes . http://www.drkoop.com/ency/93/000382.html

Home Health Reference Klinefelter syndrome Jul 29, 2005 Search: Dr.Koop MEDLINE Diseases Symptoms Procedures Natural Medicine ... Drug Library Inside DrKoop News Archive Animations Health Videos Health Tools ... Newsletters Klinefelter syndrome Injury Disease Nutrition Poison ... Prevention Klinefelter syndrome Definition: Klinefelter syndrome is a chromosome abnormality that affects only men and causes hypogonadism Alternative Names: 47 X-X-Y syndrome Causes, incidence, and risk factors: A person's sex is determined by the X and Y chromosomes. Normally, men have an X and a Y and women have two X's. In Klinefelter syndrome, a male has two X's and a Y. The condition is common and affects 1 in 500 men. The infant appears normal at birth, but the defect usually becomes apparent in puberty when secondary sexual characteristics fail to develop (or develop late). At this time, testicular changes occur that eventually result in infertility in the majority of those affected. Some mild cases may go undetected, with no abnormalities present except infertility. One risk factor for this condition is the mother giving birth at an older age. In most cases, the problem develops during fetal development and is not inherited from one or both parents.

40. Tall Persons Club GB & Ireland · Medical Information · Klinefelter Syndrome klinefelter syndrome was first described in 1942, its chromosomal basis was not klinefelter syndrome is the result of a chromosomal abnormality, http://www.tallclub.co.uk/medical/klinefelter.asp

Home Bulletin Board (BBS) Chat Room Events ... Member Login Klinefelter Syndrome back to Medical Information Abnormalities of the sex chromosomes occur in about 1.5 per 1000 births, meaning that about 1200 children are born each year with one of these conditions. Turners syndrome, in which all or part of the X chromosome is missing, affects only girls, and is easily recognised, with short stature being an obvious symptom. At birth, infants are often smaller in respect of birthweight, length, and head circumference. During childhood, growth tends to be ahead of the child's peers, particularly in terms of leg length. Even by the age of three years leg length may be disproportionate to sitting height. In a clinical study of XXY boys, two thirds of the boys developed steadily increasing obesity, while the rest displayed lean and lanky stature. In three boys, who had high growth velocities, malposition of the testes was observed, with ascent of one testis occuring, requiring orchidopexy. Testicular development was normal up to the age of one year, apart from a reduction in the number of spermatogonia. Later, tubular diameter became reduced, and germ cells were not seen. Testicular volume increased in all boys at puberty, but this was followed by involution in those with the greatest development, resulting in a slight reduction in final volume.

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