Klinefelter syndrome | Klinefelter's syndrome
Overview. Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the X chromosome. Klinefelter ...Scheduleyourappointmentnowforsafein-personcare.Learnmore:MayoClinicfactsaboutcoronavirusdisease2019(COVID-19)Our COVID-19patient andvisitorguidelines,plustrustedhealthinformationLateston COVID-19vaccination bysite:ArizonapatientvaccinationupdatesArizona,FloridapatientvaccinationupdatesFlorida,RochesterpatientvaccinationupdatesRochesterandMayoClinicHealthSystempatientvaccinationupdatesMCHSSkiptositenavigationSkiptoContentThiscontentdoesnothaveanEnglishversion.ThiscontentdoesnothaveanArabicversion.SectionsforKlinefeltersyndromeSymptoms&causesDiagnosis&treatmentDoctors&departmentsPrintOverviewKlinefeltersyndromeisageneticconditionthatresultswhenaboyisbornwithanextracopyoftheXchromosome.Klinefeltersyndromeisageneticconditionaffectingmales,anditoftenisn'tdiagnoseduntiladulthood.Klinefeltersyndromemayadverselyaffecttesticulargrowth,resultinginsmallerthannormaltesticles,whichcanleadtolowerproductionoftestosterone.Thesyndromemayalsocausereducedmusclemass,reducedbodyandfacialhair,andenlargedbreasttissue.TheeffectsofKlinefeltersyndromevary,andnoteveryonehasthesamesignsandsymptoms.MostmenwithKlinefeltersyndromeproducelittleornosperm,butassistedreproductiveproceduresmaymakeitpossibleforsomemenwithKlinefeltersyndrometofatherchildren.Products&ServicesBook:MayoClinicFamilyHealthBook,5thEditionNewsletter:MayoClinicHealthLetter—DigitalEditionShowmoreproductsfromMayoClinicSymptomsSignsandsymptomsofKlinefeltersyndromevarywidelyamongmaleswiththedisorder.ManyboyswithKlinefeltersyndromeshowfeworonlymildsigns.Theconditionmaygoundiagnoseduntiladulthoodoritmayneverbediagnosed.Forothers,theconditionhasanoticeableeffectongrowthorappearance.SignsandsymptomsofKlinefeltersyndromealsovarybyage.BabiesSignsandsymptomsmayinclude:WeakmusclesSlowmotordevelopment—takinglongerthanaveragetositup,crawlandwalkDelayinspeakingProblemsatbirth,suchastesticlesthathaven'tde
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turner syndrome中文klinefelter syndrome症狀klinefelter syndrome罕病Triple X syndromeXYY syndromeklinefelters syndrome中文Turner syndrome