[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-458399-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-458399-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","extraskeletal-chondroma-in-the-middle-ear-a-case-report","Extraskeletal Chondroma in the Middle Ear - A Case Report","","Extraskeletal chondroma (soft tissue chondroma) is a benign cartilaginous tumor that rarely arises outside the hands and feet. This case report describes the first documented extraskeletal chondroma originating in the left middle ear. A 68-year-old woman presented with left-sided hearing loss and a left external-middle ear tumor. Imaging showed a soft tissue mass in the attic and tympanic cavity extending into the external ear canal without bony or ossicular erosion. The tumor was removed via transcanal endoscopic ear surgery, with additional smaller lesions excised individually, histopathology confirming the diagnosis.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/extraskeletal-chondroma-in-the-middle-ear-a-case-report/458399/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/extraskeletal-chondroma-in-the-middle-ear-a-case-report/458399.png","ImageObject",300,407,{"name":42,"@type":43},"นรินทร์","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-11-08","2026-09-30",true,{"@type":52,"interactionType":53,"userInteractionCount":30},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What is extraskeletal chondroma and where is it usually found?","Question",{"text":62,"@type":63},"Extraskeletal chondroma, also called soft tissue chondroma, is a benign cartilaginous tumor most commonly found in the hands and feet.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"Why is the presented case medically notable?",{"text":67,"@type":63},"The report describes a first case of extraskeletal chondroma arising in the left middle ear, which is extremely rare compared with typical locations.",{"name":69,"@type":60,"acceptedAnswer":70},"How was the tumor diagnosed and treated in this case?",{"text":71,"@type":63},"Computed tomography identified a soft tissue mass occupying the attic and tympanic cavity extending into the external ear canal, and the tumor was surgically removed using transcanal endoscopic ear surgery; histopathology confirmed extraskeletal chondroma.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},458399,1790752845,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,105,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":92,"show_sort_weight":93,"slug":94},"Exam",70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":107,"slug":108},7,40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":106,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":30,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":33,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":79,"read_time":123,"preview_page_count":4},2336475104957,"https://ap-avatar.wpscdn.com/avatar/22000c4c6bd8a5076e1?x-image-process=image/resize,m_fixed,w_180,h_180&k=1787554080175789136","Review began 11/18/2025  \nReview ended 12/02/2025  \nPublished 12/08/2025  \n© Copyright 2025  \nHyakusoku et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CCBY 4.0. , which permits unrestricted use , distribution , and reproduction in any medium , provided the original author and source are credited.  \nDOI: 10.7759/cureus.98702  \nOpen Access Case Report  \nExtraskeletal Chondroma in the Middle Ear: A Case Report  \nHiroshi Hyakusoku 1, 2, Toshihide Inagi 2, Aritomo Yamazaki 2, Fumiyuki Goto 2, Koichiro Wasano 2  \n1. Otorhinolaryngology, Yokosuka Kyosai Hospital, Yokosuka, JPN 2. Otolaryngology – Head and Neck Surgery, Tokai University School of Medicine, Isehara, JPN  \nCorresponding author: Hiroshi Hyakusoku, [hhyaku@yokohama-cu.ac.jp](hhyaku@yokohama-cu.ac.jp)  \nAbstract  \nExtraskeletal chondroma, also known as soft tissue chondroma, is a benign cartilaginous tumor most commonly found in the hands and feet. The occurrence of extraskeletal chondroma in the external auditory canal is extremely rare. We report the first case of extraskeletal chondroma arising in the left middle ear. A 68-year-old female was referred to our department with a diagnosis of a left external-middle ear tumor accompanied by left-sided hearing loss. Otoscopic examination revealed a mass contacting the posterior surface of the anterosuperior quadrant of the tympanic membrane, protruding outward into the external ear canal. Computed tomography imaging demonstrated a soft tissue mass occupying the attic and tympanic cavity, extending into the external ear canal, without evidence of ossicular or bony erosion. The tumor was removed surgically using transcanal endoscopic ear surgery under general anesthesia. In addition to the prominent mass observed from the external ear canal, several smaller white and translucent tumors were identified deeper within the tympanic cavity and were meticulously removed individually. Careful monitoring may be appropriate in asymptomatic cases because malignant transformation of extraskeletal chondroma is rare. While recurrence of chondromas in the external auditory canal has not been reported, recurrence and malignant transformation have been observed in other anatomical sites. Therefore, longterm follow-up is necessary to monitor for potential recurrence or pathological progression.  \nCategories: Plastic Surgery, Otolaryngology  \nKeywords: conductive hearing loss, extraskeletal chondroma, middle ear tumor, soft tissue chondroma, transcanal endoscopic ear surgery  \nIntroduction  \nExtraskeletal chondroma, also known as soft tissue chondroma, is a benign cartilaginous tumor most commonly found in the hands or feet [1] . It typically occurs between the ages of 2 and 70 years old and shows a slight male predominance [2] . The occurrence of extraskeletal chondroma in the external auditory canal is extremely rare. Here, we report, to our knowledge, the first documented case of an extraskeletal chondroma arising in the left middle ear.  \nCase Presentation  \nA 68-year-old female was referred to Yokosuka Kyosai Hospital with a diagnosis of a left external-middle ear tumor accompanied by left-sided hearing loss. Otoscopic examination revealed an elastic and soft mass contacting the posterior surface of the anterosuperior quadrant of the tympanic membrane, protruding outward into the external ear canal (Figure 1A) . Computed tomography (CT) imaging demonstrated a soft tissue mass occupying the attic and tympanic cavity, extending into the external ear canal, without evidence of ossicular or bony erosion (Figures 1B, 1C) . Pure-tone audiometry indicated conductive hearing loss on the left side (Figure 1D) . Surgical excision of the middle ear tumor was planned using transcanal endoscopic ear surgery under general anesthesia. Following elevation of the tympanomeatal flap, the tumor was visualized within the tympanic cavity. In addition to the prominent mass observed in the external ea","cbCaimwuo7GqAMFH","https://ap.wps.com/l/cbCaimwuo7GqAMFH","pdf",1291661,"English","# Abstract\n# Introduction\n# Case Presentation\n# How to cite this article\n# Discussion","[{\"question\":\"What is extraskeletal chondroma and where is it usually found?\",\"answer\":\"Extraskeletal chondroma, also called soft tissue chondroma, is a benign cartilaginous tumor most commonly found in the hands and feet.\"},{\"question\":\"Why is the presented case medically notable?\",\"answer\":\"The report describes a first case of extraskeletal chondroma arising in the left middle ear, which is extremely rare compared with typical locations.\"},{\"question\":\"How was the tumor diagnosed and treated in this case?\",\"answer\":\"Computed tomography identified a soft tissue mass occupying the attic and tympanic cavity extending into the external ear canal, and the tumor was surgically removed using transcanal endoscopic ear surgery; histopathology confirmed extraskeletal chondroma.\"}]","Extraskeletal Chondroma in the Middle Ear - A Case Report | PDF"]