摘要
Congenitalcholesteatoma(CC)isararelyseenbenigntumorofthetemporalbone.Therearefivegeneralsitesofextraduraloccurrence:themiddleear,externalauditorymeatus,mastoid,squamousportionandthepetrousapexofthetemporalbone.CCgrowsslowlyandpresentsnosymptomsattheearlystage.Delayedandmis-diagnosisarecommonwiththiscondition~1.CasereportA10-year-oldboypresentedwitha3-monthhistoryofhearinglossonrightside.Therewasnohistoryofotorrhea,facialpalsy,previousotologicalproceduresortrauma.Otoscopyrevealedabulgingposterosuperiorquadrantintheotherwiseintactrighttympanicmembrane(Fig.1).Puretoneaudiometryshowedanaveragethresholdof51dBfor500,1000,2000and4000Hz,witha40dBair-bonegap,suggestingamoderateconductivehearingloss(Fig.4).CTscanofthetemporalboneshowedanisolatedsofttissuedensitylesioninthemiddleear(Fig.2).
出版日期
2008年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
