Osteochondromas are considered a chondroid neoplasm and are primarily a part of the growth plate which separates and continues growing independently, without an ...×ArticlesLogInCasesSignUpCoursesQuizDonateAbout×MenuSearchADVERTISEMENT:Radiopaediaisfreethankstooursupportersandadvertisers.BecomeaGoldSupporterandseenoads.ArticlesCasesCoursesLogInLoginSignup{"url":"/signup-modal-props.json?lang=us\u0026email="}ArticlesCasesCoursesQuizAboutRecentEditsGoad-freeSearchOsteochondromaDrMostafaEl-Feky◉andAssocProfFrankGaillard◉◈etal.Osteochondromasarearelativelycommonimagingfinding, accountingfor10-15%ofallbonetumorsandapproximately35%ofallbenignbonetumors.Althoughusuallythoughtofasabenignbonetumor,theymaybethoughtofasadevelopmentalanomaly. Theyarefrequentlyasymptomaticandhaveverylowmalignantpotentialifsporadicandsolitary.Onthispage:Article:EpidemiologyClinicalpresentationPathologyRadiographicfeaturesTreatmentandprognosisDifferentialdiagnosisRelatedarticlesReferencesImages:CasesandfiguresImagingdifferentialdiagnosisEpidemiologyOsteochondromasdevelopduringchildhood(periodofmostrapidskeletalgrowth),butonceformedremainfortherestoftheindividual'slife.Theycanpresentatanyageandaremostfrequentlyfoundincidentally. Theyareusuallysporadic,butcanbepartof:hereditarymultipleexostoses (HME):alsoknownasdiaphysealaclasisTrevordisease: alsoknownasdysplasiaepiphysealishemimelica Malignanttransformationoccursinthecartilagecap,andisuncommoninsporadicsolitaryosteochondromas(~1%),whereasinthesettingofhereditarymultipleexostosestherateismuchhigher(5-25%)5.ClinicalpresentationSymptomaticpresentationiseitherduetomechanicaleffectsofthelesion,fracture,ormalignanttransformation. Mechanicalsymptomsinclude:impingementuponnearbystructures:nervecompressionvascularcompressionreactivemyositispalpablelumpbursalformationandbursitisFracturesoccurtypicallythroughtheneckofpedunculatedlesions. Ongoinggrowthandorpainafterskeletalmaturityhasbeenreachedissuspiciousformalignantdegeneration. PathologyOsteochondromasarec