[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-435466-105":59,"doc-detail-435466-en":131},{"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":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","bilateral-extensor-digitorum-brevis-manus-a-case-report-and-review-of-the-literature","Bilateral Extensor Digitorum Brevis Manus - A Case Report and Review of the Literature","","Bilateral extensor digitorum brevis manus (EDBM) is an accessory muscular anomaly on the hand dorsum that can complicate preoperative identification and be mistaken for a dorsal wrist ganglion. The report presents a 25-year-old man with bilateral dorsal hand masses causing pain with movement. Clinical assessment and imaging supported the EDBM diagnosis, and surgical excision relieved symptoms with an uneventful recovery. The discussion reviews anatomical variability, diagnostic challenges, and clinical implications.",{"@graph":69,"@context":123},[70,84,106],{"@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/bilateral-extensor-digitorum-brevis-manus-a-case-report-and-review-of-the-literature/435466/",{"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/bilateral-extensor-digitorum-brevis-manus-a-case-report-and-review-of-the-literature/435466.png","ImageObject",300,407,{"name":92,"@type":93},"Indoniesian Boy","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-05","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is extensor digitorum brevis manus (EDBM) and why is it clinically important?","Question",{"text":113,"@type":114},"EDBM is an accessory muscle anomaly located on the dorsum of the hand. Its presence can be difficult to diagnose and may mimic more common swellings, leading to misdiagnosis and affecting surgical planning.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What symptoms and examination findings were reported in the patient?",{"text":118,"@type":114},"A healthy 25-year-old man had bilateral dorsal hand masses for years, painful with hand movement and exercises. Examination described a dorsum mass in extensor zone VI with smooth, well-defined edges, soft consistency, and increased prominence during movement.",{"name":120,"@type":111,"acceptedAnswer":121},"How was the diagnosis confirmed and what treatment was performed?",{"text":122,"@type":114},"Ultrasonography and magnetic resonance imaging supported an accessory muscle in the fourth extensor compartment. The patient underwent surgical excision under general anesthesia, and histopathology confirmed accessory EDBM, followed by an uneventful postoperative course.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},435466,1790719050,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":19,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":52,"preview_page_count":4},962090760608,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Case RepoRt   \nHand  \nBilateral Extensor Digitorum Brevis Manus: A Case Report and Review of the Literature  \nSaud Alkabbaa, MD Abdullah M. Alsaedan, MBBS  \nSummary: Extensor digitorum brevis manus is an accessory muscle anomaly found on the dorsum of the hand. This variation in the fourth compartment may lead to preoperative misdiagnosis. In this study, we report the case ofa 25-year-old man who presented with bilateral dorsal hand masses associated with pain during hand movement. History, examination, and imaging have led to a diagnosis of extensor digitorum brevis manus. Surgical excision was offered to the patient to relieve his symptoms, with an uneventful postoperative course. (Plast Reconstr Surg Glob Open 2026;14:e7379; doi: 10.1097/GOX.0000000000007379; Published online 5 January 2026.)  \nThe extensor digitorum brevis manus (EDBM) was  \nfirst described by Bernhard Albinus in 1734,1 after which 295 cases were reported.2 The only normally present muscular parts on the dorsum of the hand are the tendons of the wrist extensor muscles; thus, any additional muscular component represents an anatomical variation.  \nVarious muscular anomalies and their anatomical variations have been reported in the literature.3 EDBM was found in 1%–3% of the population.4–6 The diagnosis of the presence of this muscle anomaly can be difficult and is often mistaken for a dorsal wrist ganglion.3  \nPrior anatomic studies have emphasized that EDBM may show substantial variability in its origin and insertion. Ogura et al2 reported different attachment patterns and highlighted that these variations may affect both function and clinical identification. Similarly, Ranade et al3 investigated its occurrence in cadaveric dissections and confirmed that although rare, EDBM can be found in different populations.  \nIndividual case reports further demonstrate its range of presentation. Paraskevas et al4 documented an unusual insertional pattern, whereas Rohilla et al5 reported another rare case that emphasized the importance of considering EDBM in the differential diagnosis of dorsal hand swellings.4,5  \nIn addition to anatomical diversity, EDBM may illustrate functional variation. Vaghela et al6 reported a novel finding in which the muscle contributed to finger  \nFrom the Department of Plastic Surgery and Burn Unit, Prince Sultan Military Medical City, Riyadh, Saudi Arabia.  \nReceived for publication January 3, 2025; accepted November 6, 2025.  \nCopyright © 2026 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons. This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.  \nDOI: 10. 1097/GOX.0000000000007379  \nabduction, expanding the known spectrum of its potential roles. These findings highlighted that EDBM is not only an anatomical curiosity but also a clinically relevant entity that can influence diagnosis, surgical planning, and interpretation of dorsal hand swellings.  \nThis case contributed to the existing literature by showing that EDBM can occur bilaterally and mimic common dorsal hand swellings, which may lead to misdiagnosis. Recognizing this possibility is important to avoid misdiagnosis and unnecessary treatment.  \nCASE PRESENTATION  \nA 25-year-old, otherwise healthy, right-handed man visited a general practitioner complaining of bilateral masses in the dorsum of his hands for the past years. Both swellings were painful whenever he used his hands and performed his usual exercises, especially push-ups, affecting his daily activities. However, the masses did not increase in size. The patient denied any history of trauma to the hands or any history of numbness or weakness. Furthermore, the patient’s family, medication, and a","cbCaiiL7o811cbEo","https://ap.wps.com/l/cbCaiiL7o811cbEo","pdf",1170408,"English","# Summary\n# Background and Literature Review\n# Case Presentation\n## Clinical Findings\n## Imaging and Diagnosis\n## Surgical Management\n# Postoperative Course","[{\"question\":\"What is extensor digitorum brevis manus (EDBM) and why is it clinically important?\",\"answer\":\"EDBM is an accessory muscle anomaly located on the dorsum of the hand. Its presence can be difficult to diagnose and may mimic more common swellings, leading to misdiagnosis and affecting surgical planning.\"},{\"question\":\"What symptoms and examination findings were reported in the patient?\",\"answer\":\"A healthy 25-year-old man had bilateral dorsal hand masses for years, painful with hand movement and exercises. Examination described a dorsum mass in extensor zone VI with smooth, well-defined edges, soft consistency, and increased prominence during movement.\"},{\"question\":\"How was the diagnosis confirmed and what treatment was performed?\",\"answer\":\"Ultrasonography and magnetic resonance imaging supported an accessory muscle in the fourth extensor compartment. The patient underwent surgical excision under general anesthesia, and histopathology confirmed accessory EDBM, followed by an uneventful postoperative course.\"}]","Bilateral Extensor Digitorum Brevis Manus - A Case Report and Review of the Literature | PDF",1790673760]