[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-661510-105":59,"doc-detail-661510-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","tendinopathies-of-the-extensor-carpi-ulnaris-review","Tendinopathies of the Extensor Carpi Ulnaris - Review","","The extensor carpi ulnaris (ECU) uses the 6th extensor compartment, a dorsal fibro-osseous tunnel formed by the ulnar sulcus and the ECU tendon sub-sheath, for mechanical advantage. Sheath rupture or insufficiency can permit anteromedial ECU tendon subluxation, destabilizing the distal radioulnar and ulnocarpal joints. Painful degeneration may also result from excessive friction. “ECU tendinopathy” covers dysfunctional 6th compartment-related painful ECU anomalies, commonly seen in sports using bats, sticks, or clubs, with two major clinical types described.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/tendinopathies-of-the-extensor-carpi-ulnaris-review/661510/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/tendinopathies-of-the-extensor-carpi-ulnaris-review/661510.png","ImageObject",300,407,{"name":92,"@type":93},"lilac","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-28",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What anatomical structure forms the main mechanical pathway for the ECU tendon?","Question",{"text":112,"@type":113},"The ECU muscle uses the 6th extensor compartment, a dorsal fibro-osseous tunnel formed by the ulnar sulcus and the ECU tendon sub-sheath.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How can ECU tendinopathy lead to joint destabilization?",{"text":117,"@type":113},"Rupture or insufficiency of the ECU tendon sub-sheath may allow anteromedial ECU tendon subluxation, destabilizing the distal radioulnar and ulnocarpal joints.",{"name":119,"@type":110,"acceptedAnswer":120},"What are the two major types of ECU tendinopathy?",{"text":121,"@type":113},"Constrained tendinopathies involve entrapment of a thickened overused tendon, while unconstrained tendinopathies involve rupture of the ECU sub-sheath with ECU subluxation in a volar direction, eliminating stabilizing potential.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},661510,1793168631,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":143},3985747861865,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Review 281  \nTendinopathies of the Extensor Carpi Ulnaris Tendinopathien des Extensor carpi ulnaris  \nAuthor M. Garcia-Elias  \nAffiliation Institut Kaplan, Surgery of the Hand and the Upper Extremity, Barcelona (Spain)  \nKey words  \n Dislocation of the ECU tendon  \n ECU tendon sub-sheath  \n ECU tendinopathy  \n Extensor retinaculum  6th extensor compartment  \nSchlüsselwörter  \n Dislokation der ECU-Sehne  \n ECU-Sehnenscheide (sub-sheath)  ECU-Tendinopathie  \n Extensor retinaculum  6. Strecksehnenfach  \nreceived accepted  \n8.8.2015 10.8.2015  \nBibliography  \nDOI [http://dx.doi.org/](http://dx.doi.org/)[ ](http://dx.doi.org/)[10.1055/s-0035-1559720](10.1055/s-0035-1559720)[ ](10.1055/s-0035-1559720)Handchir Mikrochir Plast Chir 2015; 47: 281–289  \n© Georg Thieme Verlag KG Stuttgart · New York ISSN 0722-1819  \nCorrespondence  \nMarc Garcia-Elias MD, PhD  \nInstitut Kaplan  \nPasseig de la Bonanova  \n9, 2on 2a 08022 Barcelona Spain  \n[garciaelias@institut-kaplan.com](garciaelias@institut-kaplan.com)  \nAbstract  \n▼  \nTo improve its mechanical advantage, the extensor carpi ulnaris (ECU) muscle uses, as if it was a pulley, the 6th extensor compartment, a dorsal fibro-osseous tunnel formed by the ulnar sulcus and the ECU tendon sub-sheath. Rupture or insufficiency of that sheath may allow anteromedial ECU tendon subluxation and subsequent destabilization of the distal radioulnar and ulnocarpal joints. Sometimes, it is not sheath problem, but excessive friction between the sheath and the tendon what causes a painful degeneration of the tendon (tendinosis) with or without tendon entrapment. The term“ECU tendinopathy” has been chosen to designate all painful ECU anomalies resulting from a dysfunctional 6th extensor compartment. ECU tendinopathies are frequent among sportsmen using bats, sticks or clubs. There are 2 major types of tendinopathy:  \n1) constrained tendinopathies, where there is entrapment of a thickened overused tendon, and 2) unconstrained tendinopathies, where a ruptured ECU sub-sheath allows the ECU to sublux ina volar direction, a position precluding all its stabilizing potential. In the first type, the goal of the treatment is to avoid further degeneration and subsequent rupture of the diseased tendon; in the second, to re-establish the normal connections between the ulna and the ECU tendon. This article reviews the management of the most frequent ECU tendinopathies.  \nZusammenfassung  \n▼  \nZur Optimierung seines mechanischen Nutzeffektes verwendet der M. extensor carpi ulnaris (ECU) das 6. Strecksehnenfach, einen osteofibrösen Gleitkanal bestehend aus einer Rinne im Ellenkopf (ulnar sulcus) und einer Sehnenscheide (ECU tendon sub-sheath), die unabhängig vom Retinaculum extensorum ist, wie ein Ringband. Bei Insuffizienz und Ruptur dieser Sehnenscheide kann die ECU-Sehne nach anteriormedial subluxieren und es in Folge zur Destabilisation des distalen Radioulnargelenkes und der ulnokapalen Gelenke kommen. Auch bei intakten Sehnenscheide kann es zu schmerzhafter Degeneration der ECU-Sehne kommen, mit und ohne Blockierungen. Der Terminus “ECU-Tendinopathie” beschreibt schmerzhafte Zustände der ECU-Sehne in Folge einer Fehlfunktion des 6. Strecksehnenfaches. ECU-Tendinopathien werden häufig bei Schlagsportarten beobachtet. 2 Hauptformen sind zu unterscheiden: 1) Sehnenscheidenengen bei verdickter ECU-Sehne infolge einer Überbeanspruchung und 2) Rupturen der ECUSehnenscheide mit Subluxation der ECU-Sehne nach palmar und Verlust der stabilisierenden Wirkung der Sehne. Im ersteren Falle gilt es die weitere Degeneration und letztlich die Ruptur der Sehne zu verhindern; im zweiten Fall die ECU-Sehne zu reponieren und die normale anatomische Beziehung zwischen ECU-Sehne und Ulnakopf wieder herzustellen. Dieser Artikel gibt einen Überblick über die häufigsten Tendinopathien der ECU-Sehne.  \nIntroduction  \n▼  \nFrom a biomechanical point of view, pouring water from a pitcher in a glass is not as simple as it may appear. It is a complex un","cbCaiszIjQ3mEi7C","https://ap.wps.com/l/cbCaiszIjQ3mEi7C","pdf",1027650,"English","# Abstract\n## Mechanism of ECU tendinopathy\n## Two major types of tendinopathy\n# Introduction\n## Loaded pronosupination tasks and biomechanical stress\n## ECU tendon as a frequent target","[{\"question\":\"What anatomical structure forms the main mechanical pathway for the ECU tendon?\",\"answer\":\"The ECU muscle uses the 6th extensor compartment, a dorsal fibro-osseous tunnel formed by the ulnar sulcus and the ECU tendon sub-sheath.\"},{\"question\":\"How can ECU tendinopathy lead to joint destabilization?\",\"answer\":\"Rupture or insufficiency of the ECU tendon sub-sheath may allow anteromedial ECU tendon subluxation, destabilizing the distal radioulnar and ulnocarpal joints.\"},{\"question\":\"What are the two major types of ECU tendinopathy?\",\"answer\":\"Constrained tendinopathies involve entrapment of a thickened overused tendon, while unconstrained tendinopathies involve rupture of the ECU sub-sheath with ECU subluxation in a volar direction, eliminating stabilizing potential.\"}]","Tendinopathies of the Extensor Carpi Ulnaris - Review | PDF",23]