Skin cyst. A skin cyst is a fluid-filled lump just underneath the skin. It's common and harmless, and may disappear ...SkiptomaincontentHomeHealthAtoZBacktoHealthAtoZSkincystAskincystisafluid-filledlumpjustunderneaththeskin.It'scommonandharmless,andmaydisappearwithouttreatment.Itcanbedifficulttotellwhetheralumpisacystorsomethingelsethatmightneedtreatment.YoushouldthereforeseeaGPifyouhaveanysortoflumpsoitcanbeproperlydiagnosed.Cystsaresometimesconfusedwith boilsorskinabscesses.Boilsandabscessesarepainfulcollectionsofpusthatarecausedbybacterialinfections.Acystmaygoontobecomeaboilorabscess.WhatacystlookslikeAskincystisaround,dome-shapedlump.It'syelloworwhite,oftenwithasmalldarkplugthroughwhichyoumightbeabletosqueezeoutpus.Cystscanrangeinsizefromsmallerthanapeatoafewcentimetresacross.Theygrowslowly.Skincystsdonotusuallyhurt,butcanbecometender,soreandrediftheybecomeinfected.Foul-smellingpuscomingoutofthecystisanothersignofinfection.TypesofskincystEpidermoidcysts(oneofthemaintypes)arecommonlyfoundontheface, neck, chest,shouldersorskinaroundthe genitals.Theyaffectyoungandmiddle-agedadults,andareparticularlycommoninpeoplewithacne.Theydonotusuallyruninfamilies.Cyststhatformaroundhairfolliclesareknownaspilarcysts.They'reoftenfoundonthescalp.Pilarcyststypically affectmiddle-agedadults,mostlywomen.Unlikeepidermoidcysts,theyruninfamilies.Acystthatformsontheeyelidiscalledachalazionormeibomiancyst.Whydocystsform?Someofthecellsinthetoplayerofskinproducekeratin,aproteinthatgivesskinitsstrengthandflexibility.Normally,thesecellsmoveup tothesurfaceoftheskinastheystarttodiesotheycanbeshed.Butthecellssometimesmovedeeperintotheskinandmultiply,formingasac.Theysecretekeratinintothemiddleofthesac,whichformsa thick,yellowpaste.Thiscanoozeoutofthecystifit'sburst.Anyonecandevelopaskincyst,butyou'remorelikelytohaveoneifyou'vebeenthroughpuberty,youhaveahistoryofacne,oryou'veinjuredtheskin (forexample,ifyou'vedamagedahairfollicle).Skincystsarenotcontagious.WhatyoucandoifyouhaveaskincystCystsareusu

What Is It? ... Cysts are sacs or capsules that form in the skin or inside the body. They may contain fluid or semisolid material. Although cysts can appear anywhere ...SkiptocontentCysts(Overview)WhatIsIt?Published:December,2018Cystsaresacsorcapsulesthatformintheskinorinsidethebody.Theymaycontainfluidorsemisolidmaterial.Althoughcystscanappearanywhereinthebody,mostfrequentlytheyliveintheskin,ovaries,breastsorkidneys.Mostcystsarenotcancerous.Commonlocationsofcystsinclude:Skin—Twotypesofcystscommonlyoccurunderneaththeskin,epidermoidcystsandsebaceouscysts.Bothusuallyappearasflesh-coloredorwhitish-yellowsmooth-surfacedlumps.Epidermoidcystsformwhensurfaceskincellsmovedeeperintotheskinandmultiply.Thesecellsformthewallofthecystandsecreteasoft,yellowishsubstancecalledkeratin,whichfillsthecyst.Sebaceouscystsforminsideglandsthatsecreteanoilysubstancecalledsebum.Whennormalglandsecretionsbecometrapped,theycandevelopintoapouchfilledwithathick,cheese-likesubstance.Commonsitesincludethebackoftheneck,theupperbackandthescalp.Wrists—Ganglioncystsdevelopasrubberyorsoftswellings,usuallyinresponsetoaminorinjurythattriggersexcessjointfluidtocollectinasaclikestructurenexttothejoint.Ganglioncystsalsocanoccuronthefingersorfeet.Knees—ABaker'scystisapouchofjointfluidthatcollectsbehindthebendoftheknee.Becauseofitslocation,thiscystmaycausethekneejointtofeelswollenortight.Inmostpeople,Baker'scystsarelinkedtoarthritisorkneeinjury.Ovaries—Anovarianfolliclethatdoesn'treleaseitseggmayformacystontheovary.Thesecystsarenotharmfulandusuallydisappearaftertwotothreemonths.Breasts—Breastlumpsmaybeeithercysticorsolid.Breastcystsarealmostalwaysbenign(non-cancerous).Vagina—Bartholin'sglandcystsmaydevelopinoneoftheBartholin'sglands,whichliejustinsidethevaginalcanalandproduceaprotective,lubricatingfluid.ThebuildupofsecretionsorinfectionsinsideoneoftheBartholin'sglandscancausetheglandtoswellandformacyst.Cervix—Nabothiancystsdevelopwhenoneofthemucousglandsofthecervixbecomesobstructed.Kidneys—Solitarycysts(alsokno

A cyst is a sac-like pocket of tissue that contains fluid, air, or other substances. They can grow almost everywhere in the body or under the skin. There are a ...What’sCausingThisCyst?MedicallyreviewedbyStacySampson,D.O.—WrittenbyAmandaDelgado—UpdatedonNovember9,2018PicturesofcystsIdentificationCausesTypesWhentoseekhelpTreatmentOutlookPreventionOverviewAcystisasac-likepocketofmembranoustissuethatcontainsfluid,air,orothersubstances.Cystscangrowalmostanywhereinyourbodyorunderyourskin.Therearemanydifferenttypesofcysts.Mostcystsarebenign,ornoncancerous.Whetheracystneedstreatmentdependsonanumberoffactors,including:thetypeofcystthelocationofthecystifthecystiscausingpainordiscomfortwhetherthecystisinfectedIfyou’renotsureofwhatyourownskinconditionis,youcantakeapictureandsendittoanonlinedermatologist.PicturesofcystsandconditionsthatcausecystsCystscanvaryinappearancedependingontheirtypeandlocation.Hereare13differenttypesofcyst.Warning:Graphicimagesahead.EpidermoidcystShareonPinterestEpidermoidcystsaresmall,slow-growing,benigncystsmostcommonlyfoundontheface,head,neck,back,orgenitals.They’reusuallycausedbyabuildupofkeratinundertheskin.Theylooklikeskin-colored,tan,oryellowishbumpsfilledwiththickmaterial.Theymaybecomeswollen,red,andpainfuliftheyareinfected.Readfullarticleonepidermoidcysts.SebaceouscystShareonPinterestSebaceouscystsarefoundontheface,neck,ortorsoLargecystsmaycausepressureandpainTheyarenoncancerousandveryslowgrowingReadfullarticleonsebaceouscysts.BreastcystShareonPinterestMostbreastlumpsarenoncancerous,buttherearemanypossiblecausesforalumpinyourbreast.It’simportanttobefamiliarwithhowyourbreastsnormallyfeelsoyouareawareofchanges.Insteadofperformingbreastself-examination,mostexpertsrecommendthatwomensimplybeawareofwhattheirbreastsnormallylookandfeellikeandreportanychangestotheirhealthcareprovider.Youshouldmakeanappointmenttoseeahealthcareproviderifyoudiscoveranewlump;anareaofyourbreastisnoticeablydifferentthantherest;alumpchangesorgrowslarger;younoticebloodydischarge

鰓裂囊腫(branchial cleft cyst). 定義 胚胎發育過程中由於第一咽裂(1st pharyngeal cleft)的發育異常，或是第二咽弓沒有完全覆蓋第三和第四咽弓等原因造成頸 ...鰓裂囊腫|醫學影像學習園地首頁臨床案例心血管肝膽腸胃胸腔婦產泌尿耳鼻喉癌症分期外傷嚴重度分數正常構造指引正常X光解剖位置頭部脊椎胸部腹部上肢下肢正常CT解剖位置指引頭部胸部AXIAL胸部CORONAL頸部腹部AXIAL腹部CORONAL正常MRI解剖位置指引頭部頸部脊椎SAGGITAL脊椎AXIAL肩部SAGGITAL肩部CORONAL肩部AXIAL醫學影像工具電腦斷層攝影(CT)簡介磁振造影(MRI)簡介乳房攝影及BIRADS診斷網站資訊留言板常見問題與討論區相關連結網頁製作團隊鰓裂囊腫(branchialcleftcyst)定義胚胎發育過程中由於第一咽裂(1stpharyngealcleft)的發育異常，或是第二咽弓沒有完全覆蓋第三和第四咽弓等原因造成頸竇(cervicalsinus)沒有消失。

便形成了鰓裂囊腫(branchialcleftcyst)。

鰓裂囊腫的位置視其胚胎發育來源而定。

第一鰓裂囊腫通常位於耳翼(pinna)前後或是耳下腺附近;而第二～四鰓裂則通常在下頜角的正下方或是沿著胸鎖乳突肌前緣出現。

鰓裂囊腫可以向外至皮膚或向內至咽喉形成瘻管(fistula)。

流行病學與性別無關，年齡方面五歲以前發現佔多數，其次則是在20~30歲時發現。

(twopeaks)症狀慢慢變大的腫塊，不痛不紅，質地偏軟的外頸腫塊。

大小1~10cm都有，病人可能敘述在上呼吸道感染之後會反覆變大。

皮膚上不一定能看得到瘻管。

影像診斷CT:NECT:HypodensecystCECT:Well-denfined,homogenenious,hypodensecystwithnonenhancingwall若鰓裂囊腫有受到感染，則囊壁會變厚且周遭軟組織會因發炎反應而變得腫脹治療以外科手術切除為主。

預後佳,但若鰓裂未完全切除,則有復發的可能性。

臨床案例三十歲健康男性，偶然發現左側頸部有一腫塊。

腫塊的位置在頸部左外上側下巴下方，大小約比五十元硬幣大，外型微凸，質地柔軟，沒有壓痛的感覺。

病患並不會因為這個腫塊而有頸部活動受限的感覺或是吞嚥不舒服的感覺。

也沒有發音的變化抑或是耳鳴、複視、眼瞼下垂、顏面感覺異常、容易鼻塞、或是口水鼻涕有血絲的情況。

這個腫塊已經持續一年多，病患自述並沒有明顯的變化，也沒有明顯的情況會改變腫瘤的大小。

病患自訴過去一年以來沒有出國旅遊也沒有接觸過動物。

影像AxialCTwithcontrast:Well-denfined,homogenenious,hypodensecysticmasswithoutringenhancement.CoronalCTwithcontrast:DifferentialDiagnosisD.D.for1stbranchialcleftcyst:Lymphangioma1.unilocular~multilocularsolidmasswithvariablecontrastenhancemnet2.nonenhancingwallSjogrensyndrome1.dryeyeanddrymonthasclinicalfindingsSuppurativeparotidlymphnode1.markedtendernessmasswithfeverasclinicalfindingsD.D.for2nd~4thbranchialcleftcyst:Cysticvagalschwannoma1.Thick,enhancingwallunderCECT2.Extendedfromvagusnerve3.SolidtumormassLymphangioma1.unilocular~multilocularsolidmasswithvariablecontrastenhancemnet2.nonenhancingwall參考資料1.Donnelyetal.:Diagnosticimaging.Pediatrics.1sted.Amirsys,2005.2.Harnsbergeretal.:Diagnosticimaging.Headandneck.1st.Amirsys,2004.3.HaroldLudman,PatrickJ.Bradley:AB

What Is a Cyst? It's a lump of fluid, air, or something else. Cysts are very common, and most aren't cancer ...SkinProblemsandTreatmentsSlideshowsIt’salumpoffluid,air,orsomethingelse.Cystsareverycommon,andmostaren’tcancer.Youmayneedtests(likeaCTscan,ultrasound,orbiopsy)toconfirmthatit’sacyst.Often,cystsdon’tneedtreatment,butyourdoctorcanletyouknowifyoursdoes.Youcangetcystsinmanydifferentpartsofyourbody,andyoumaynotevenknowthatthey’rethere.SwipetoadvanceYougetacnewhenoilanddeadskinblockapore.Thisoftencausesasmallgrowth,or“pimple,”thatgoesawayonitsownorwithover-the-counterdrugs.Ifit’smoreseriousorapimplegetsveryirritated,youmightgetalargersquishygrowthcalledacyst.(Hardgrowthsarecallednodules.)Talktoyourdoctorabouttreatmentincludingantibioticsandothermedicationsforyourcysts.SwipetoadvanceAsoft,fluid-filledlumpcanformatthebackofyourkneeifyouinjurethejointbecauseofarthritis,inflammation,atornligament,orothercauses.Youmightmistakeitforabloodclot.Restwithyourlegraisedupandicetheareafor15minutesatatime.Anti-inflammatorydrugscouldalsohelp.Insomecasesyourdoctormaysuggestsurgeryoruseaneedletodrainitorinjectsteroidstolessenswelling.SwipetoadvanceThetinyBartholinglandsaredeepundertheskinoneithersideofthevaginaopening.Theirjobseemstobetomakefluidsforsex.Ifsomethingblocksaductinoneoftheseglands,itfillswithmucusandgetsbigger.Itcouldevengetinfectedandformasorecalledanabscess.Tubsoakscanhelp.Inseriouscases,yourdoctormightdosurgerytocreateapermanentdrainorremovethecyst.SwipetoadvanceYoumightnoticeoneormoresmoothlumpswithclearedgesonyourbreast,butyoucan’talwaysfeelthem.Theymayhurtinthedaysjustbeforeyourperiodstartsorwhenyouhavelotsofcaffeine.They’reverycommonandmorelikelyrightbeforemenopause,orafterward,ifyoutakereplacementhormones.Youdon’tusuallyneedtotreatthem,butseeyourdoctoraboutanybreastlumpbecauseitmaybesomethingmoreseriousthanacyst.SwipetoadvanceInthewomb,ababy’sbladderconnectstoitsbellybuttonthroughachannelcalledtheurachusintheabdominalwallgut.Ifitdoesn’tclosebythetimeyou’rebor

Summary. Cysts are abnormal, fluid-filled sacs that can develop in tissues in any part of the body. They are relatively common, and there ...WhattoknowaboutcystsMedicallyreviewedbyDebraSullivan,Ph.D.,MSN,R.N.,CNE,COI—WrittenbyTimNewman—UpdatedonJune9,2020PicturesCausesBenignandmalignantSymptomsTypesTreatmentSummaryCystsareclosedcapsuleorsac-likestructures,typicallyfilledwithaliquid,semisolid,orgaseousmaterial,muchlikeablister.Cystsvaryinsizefrommicroscopictoverylarge.Verylargecystscandisplaceinternalorgans.Themajorityarebenign,butsomecystscanbecancerousorprecancerous.Acystisnotanormalpartofthetissuewhereitislocated.Ithasadistinctmembraneandisseparatedfromnearbytissue.Theouter(capsular)portionofacystiscalledthecystwall.Ifthesacisfilledwithpus,thecystisinfectedandwillturnintowhatiscalledanabscess.Thisarticlelooksatthedifferenttypesofcyst,theircausesandsymptoms,andsometreatmentoptions.PicturesWhatcausescysts?Cystsarecommonandcanoccuranywhereonthebody.Theyareoftenaresultofinfection,cloggedsebaceousglands,orpiercings.Someothercommoncausesofcystsinclude:tumorsgeneticconditionsafaultinanorganofadevelopingembryoadefectinthecellschronicinflammatoryconditionsblockagesofductsinthebodythatcausefluidstobuildupaparasiteaninjurythatbreaksavesselInmostcases,itisunusualforcyststocausepainunlesstheyrupture,becomeinfected,orareinflamed.BenignandmalignantcystsMostcystsarebenignanddevelopduetoblockagesinthebody’snaturaldrainagesystems.However,somecystsmaybetumorsthatforminsidetumors.Thesecanbemalignant,orcancerous.Cystsarenotthesameastumors.Learnabouttumorsvs.cystshere.SymptomsofcystsThesignsandsymptomswillvarywidelydependingonwhattypeofcystitis.Inmanycases,apersonfirstbecomesawareofanabnormallump,particularlywhenthecystisjustbeneaththeskin.Manyinternalcysts,suchasthosethatoccurinthekidneysortheliver,maynotcauseanysymptomsatall.Theymaygounnoticeduntilanimagingscan—suchasanMRI,CT,orultrasoundscan—detectsthem.Ifacystdevelopsonthebrain,itcancauseheadachesandothersymptoms.Breastcystscanalso

A cyst is a closed capsule or sac-like structure, usually filled with liquid, semisolid, or gaseous material. Cysts usually occur within almost any type of the body's ...FactsCystfactsDefinitionWhatisacyst?TypesWhatarethedifferenttypesofcysts?CausesWhatcausesacyst?RiskFactorsWhatareriskfactorsforacyst?SymptomsWhatarecystsymptomsandsigns?SpecialistsWhattypesofdoctorstreatcysts?DiagnosisHowdophysiciansdiagnoseacyst?TreatmentWhatisthetreatmentforacyst?HomeRemediesWhatarehomeremediesforcysts?PrognosisWhatistheprognosisofacyst?PreventionIsitpossibletopreventacyst?CenterCystsCenterCommentsPatientComments:Cyst-SymptomsandSignsPatientComments:Cyst-TreatmentPatientComments:Cysts-DiagnosisPatientComments:Cysts-ExperiencePatientComments:Cysts-DifferentTypesCystfactsPictureofaganglioncyst.Skincystsareclosedsac-likeorcapsulestructuresthatmaybefilledwithsemisolidmaterial,gaseousmaterial,orliquid.Thereareseveralcausesofcysts,includinggenetic,infectious,andothercausesthatresultinhundredsoftypesofcysts.Riskfactorsfordevelopingacystarerelatedtotheunderlyingcausesofthecystformation.Mostcystsareasymptomaticandhavenosigns.However,somecystsontheskin,mucousmembranes,andthoselocatedinpalpableorgansoftencanbefeltasalumporbump;sometimestheymaycausepain.Somecystsmayproducesymptomsrelatedtotheorgansinwhichtheyarelocated(forexample,liver,pancreas,orkidneys).It'spossibletodiagnosecystsbypalpation,ultrasound,X-rays,CTscans,MRIscans,andneedlebiopsies.Mostcystsdonotrequiretreatment,however,physiciansmayuseneedleaspirationorsurgicalremovaltotreatsomecysts.Therearemanyspecialists,bothmedicalandsurgical,whomaytreatcysts.Checkwithadoctorbeforetryinghomeremediestoremovecysts.Theprognosisformostcystsisgood;afewcyststhatcontainmalignantcellshaveamoreguardedprognosis.Mostcystsarenotpreventable;thosethatarepreventableareusuallyrelatedtoinfectiouscauses.Whatisacyst?ReadersComments8ShareYourStoryAcystisaclosedcapsuleorsac-likestructure,usuallyfilledwithliquid,semisolid,orgaseousmaterial.Cystsusuallyoccurwithi

A cyst is a closed sac, having a distinct envelope and division compared with the nearby tissue. ... A cyst may contain air, fluids, or semi-solid material. A collection ...CystFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchThisarticleisaboutcystsinthebody.FortheICAOairportcodeCYST,seeSt.TheresaPointAirport.Forhard-shelledrestingstagesofsomesmallorganisms,seeMicrobialcyst.ClosedsacgrowthonthebodyCystH&EstainedmicrographofamediastinalbronchogeniccystSpecialtyPathology,generalsurgeryAcystisaclosedsac,havingadistinctenvelopeanddivisioncomparedwiththenearbytissue.Hence,itisaclusterofcellsthathasgroupedtogethertoformasac(likethemannerinwhichwatermoleculesgrouptogethertoformabubble);however,thedistinguishingaspectofacystisthatthecellsformingthe"shell"ofsuchasacaredistinctlyabnormal(inbothappearanceandbehaviour)whencomparedwithallsurroundingcellsforthatgivenlocation.Acystmaycontainair,fluids,orsemi-solidmaterial.Acollectionofpusiscalledanabscess,notacyst.Onceformed,acystmayresolveonitsown.Whenacystfailstoresolve,itmayneedtoberemovedsurgically,butthatwoulddependuponitstypeandlocation.Cancer-relatedcystsareformedasadefensemechanismforthebodyfollowingthedevelopmentofmutationsthatleadtoanuncontrolledcellulardivision.Oncethatmutationhasoccurred,theaffectedcellsdivideincessantlyandbecomecancerous,formingatumour.Thebodyencapsulatesthosecellstotrytopreventthemfromcontinuingtheirdivisionandcontainthetumour,whichbecomesknownasacyst.Thatsaid,thecancerouscellsstillmaymutatefurtherandgaintheabilitytoformtheirownbloodvessels,fromwhichtheyreceivenourishmentbeforebeingcontained.Oncethathappens,thecapsulebecomesuseless,andthetumourmayadvancefrombenigntocancerous.Somecystsareneoplastic,andthusarecalledcystictumors.Manytypesofcystsarenotneoplastic;somearedysplasticormetaplastic.Pseudocystsaresimilartocystsinthattheyhaveasacfilledwithfluid,butlackanepitheliallining.Contents1Terminology2Cystsbylocation2.1Femalereproductivesystem2.2Scrotum2.3Cutaneousandsubcutaneous2.4Headandneck2

Female reproductive system ... Ovarian cysts are fluid-filled sacs or pockets in an ovary or on its surface. Women have two ovaries — each about ...Scheduleyourappointmentnowforsafein-personcare.Learnmore:MayoClinicfactsaboutcoronavirusdisease2019(COVID-19)Our COVID-19patient andvisitorguidelines,plustrustedhealthinformationLateston COVID-19vaccination bysite:ArizonapatientvaccinationupdatesArizona,FloridapatientvaccinationupdatesFlorida,RochesterpatientvaccinationupdatesRochesterandMayoClinicHealthSystempatientvaccinationupdatesMCHSSkiptositenavigationSkiptoContentThiscontentdoesnothaveanEnglishversion.ThiscontentdoesnothaveanArabicversion.SectionsforOvariancystsSymptoms&causesDiagnosis&treatmentDoctors&departmentsPrintOverviewFemalereproductivesystemOpenpop-updialogboxCloseFemalereproductivesystemFemalereproductivesystemTheovaries,fallopiantubes,uterus,cervixandvagina(vaginalcanal)makeupthefemalereproductivesystem.Ovariancystsarefluid-filledsacsorpocketsinanovaryoronitssurface.Womenhavetwoovaries—eachaboutthesizeandshapeofanalmond—oneachsideoftheuterus.Eggs(ova),whichdevelopandmatureintheovaries,arereleasedinmonthlycyclesduringthechildbearingyears.Manywomenhaveovariancystsatsometime.Mostovariancystspresentlittleornodiscomfortandareharmless.Themajoritydisappearswithouttreatmentwithinafewmonths.However,ovariancysts—especiallythosethathaveruptured—cancauseserioussymptoms.Toprotectyourhealth,getregularpelvicexamsandknowthesymptomsthatcansignalapotentiallyseriousproblem.Products&ServicesBook:MayoClinicFamilyHealthBook,5thEditionNewsletter:MayoClinicHealthLetter—DigitalEditionShowmoreproductsfromMayoClinicSymptomsMostcystsdon'tcausesymptomsandgoawayontheirown.However,alargeovariancystcancause:Pelvicpain—adullorsharpacheinthelowerabdomenonthesideofthecystFullnessorheavinessinyourabdomenBloatingWhentoseeadoctorSeekimmediatemedicalattentionifyouhave:Sudden,severeabdominalorpelvicpainPainwithfeverorvomitingIfyouhavethesesignsandsymptomsorthoseofshock—cold,clammyskin;rapidbr

Read about the causes of ovarian cysts, which often develop naturally if you have monthly periods.SkiptomaincontentHomeHealthAtoZOvariancystBacktoOvariancystCauses-OvariancystContentsOverviewCausesTreatmentOvariancystsoftendevelopnaturallyifyouhavemonthlyperiods.Theycanalsoaffectpeoplewhohavebeenthroughthemenopause.TypesofovariancystTherearemanydifferenttypesofovariancyst,whichcanbecategorisedaseither:functionalcystspathologicalcystsFunctionalcystsFunctionalovariancystsarelinkedtothemenstrualcycle.Theyhappenifyouhavenotbeenthroughthemenopause,andtheyareverycommon.Eachmonth,ovariesreleaseanegg,whichtravelsdownthefallopiantubeswhereitcanbefertilisedbysperm.Eacheggformsinsidetheovaryinastructureknownasafollicle.Thefolliclecontainsfluidthatprotectstheeggasitgrows,anditburstswhentheeggisreleased.Butsometimesafollicledoesnotreleaseanegg,ordoesnotdischargeitsfluidandshrinkaftertheeggisreleased.Ifthishappens,thefolliclecanswellandbecomeacyst.Functionalcystsarenon-cancerous(benign)andareusuallyharmless,althoughtheycansometimescausesymptomssuchaspelvicpain.Mostwilldisappearinafewmonthswithoutneedinganytreatment.PathologicalcystsPathologicalcystsarecausedbyabnormalcellgrowthandarenotrelatedtothemenstrualcycle.Theycandevelopbeforeandafterthemenopause.Pathologicalcystsdevelopfromeitherthecellsusedtocreateeggsorthecellsthatcovertheouterpartoftheovary.Theycansometimesburstorgrowverylargeandblockthebloodsupplytotheovaries.Pathologicalcystsareusuallynon-cancerous,butasmallnumberarecancerous(malignant)andoftensurgicallyremoved.ConditionsthatcauseovariancystsInsomecases,ovariancystsarecausedbyanunderlyingcondition,suchasendometriosis.Endometriosisoccurswhenpiecesofthetissuethatlinethewomb(endometrium)arefoundoutsidethewombinthefallopiantubes,ovaries,bladder,bowel,vaginaorrectum.Blood-filledcystscansometimesforminthistissue.Polycysticovarysyndrome(PCOS)isaconditionthatcauseslotsofsmall,harmlesscyststodeveloponyourovaries.Thecystsaresmalleggfolliclesthatdonotgrowtoovulationandarecausedb