An undescended testicle (cryptorchidism) is a testicle that hasn't moved into its proper position in the bag of skin hanging below the penis ...COVID-19:Advice,updatesandvaccineoptionsWeareopenforsafein-personcare.Learnmore:MayoClinicfactsaboutcoronavirusdisease2019(COVID-19)OurCOVID-19patientandvisitorguidelines,plustrustedhealthinformationLateston COVID-19vaccination bysite:ArizonapatientvaccinationupdatesArizona,FloridapatientvaccinationupdatesFlorida,RochesterpatientvaccinationupdatesRochesterandMayoClinicHealthSystempatientvaccinationupdatesMCHSSkiptositenavigationSkiptoContentThiscontentdoesnothaveanEnglishversion.ThiscontentdoesnothaveanArabicversion.SectionsforUndescendedtesticleSymptoms&causesDiagnosis&treatmentDoctors&departmentsCareatMayoClinicPrintOverviewAnundescendedtesticle(cryptorchidism)isatesticlethathasn'tmovedintoitsproperpositioninthebagofskinhangingbelowthepenis(scrotum)beforebirth.Usuallyjustonetesticleisaffected,butabout10percentofthetimebothtesticlesareundescended.Anundescendedtesticleisuncommoningeneral,butcommonamongbabyboysbornprematurely.Thevastmajorityofthetime,theundescendedtesticlemovesintotheproperpositiononitsown,withinthefirstfewmonthsoflife.Ifyoursonhasanundescendedtesticlethatdoesn'tcorrectitself,surgerycanrelocatethetesticleintothescrotum.SymptomsNotseeingorfeelingatesticlewhereyouwouldexpectittobeinthescrotumisthemainsignofanundescendedtesticle.Testiclesformintheabdomenduringfetaldevelopment.Duringthelastcoupleofmonthsofnormalfetaldevelopment,thetesticlesgraduallydescendfromtheabdomenthroughatube-likepassagewayinthegroin(inguinalcanal)intothescrotum.Withanundescendedtesticle,thatprocessstopsorisdelayed.WhentoseeadoctorAnundescendedtesticleistypicallydetectedwhenyourbabyisexaminedshortlyafterbirth.Ifyoursonhasanundescendedtesticle,askthedoctorhowoftenyoursonwillneedtobeexamined.Ifthetesticlehasn'tmovedintothescrotumbythetimeyoursonis4monthsold,theproblemprobablywon'tcorrectitself.Treatinganundescendedtesticlewhenyoursonisstillab