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This case report describes a 75-year-old woman who sustained a type 2 inferior dislocation after a fall. Imaging identified a femoral trochlear osteochondral defect and lax but largely intact patella tendon. Closed reduction was performed under general anesthesia, followed by arthroscopy with smoothing and debridement, yielding anatomical alignment and good postoperative mobilization.",{"@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/inferior-patella-dislocation-in-an-elderly-patient-after-a-fall-a-case-report/406739/",{"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/inferior-patella-dislocation-in-an-elderly-patient-after-a-fall-a-case-report/406739.png","ImageObject",300,407,{"name":92,"@type":93},"Ben ","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-28",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What makes inferior intra-articular patella dislocation rare and how is it classified?","Question",{"text":112,"@type":113},"It is rare and includes horizontal (type 1) and more common vertical (type 2) dislocations across young and elderly patients. The article focuses on the mechanisms, classification, imaging features, and management of these types.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How was the patient with a type 2 inferior dislocation treated?",{"text":117,"@type":113},"Closed reduction was performed under general anesthesia. Knee arthroscopy then confirmed a femoral trochlear osteochondral defect, followed by smoothing of the defect edges, debridement of debris, and thorough joint irrigation.",{"name":119,"@type":110,"acceptedAnswer":120},"What factors determine management choice between closed and open reduction?",{"text":121,"@type":113},"For type 2 injuries, closed reduction can be successful, but depends on the depth and size of the osteochondral defect and the degree of patella rotation. Open reduction is recommended for type 1 injuries due to associated soft tissue injury, and for type 2 when large osteochondral defects, sizable osteophytes, or intra-articular loose bodies are present.","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},406739,1791035574,{"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":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":39,"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":143,"read_time":46,"preview_page_count":4},2336478951081,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","| W | J | O | World Journal of\u003Cbr>Orthopedics |\n| --- | --- | --- | --- |\n\nSubmit a Manuscript: [https://www.f6publishing.com](https://www.f6publishing.com) World J Orthop 2025 December 18; 16(12): 111602  \nDOI: 10.5312/wjo.v16.i12.111602 ISSN 2218-5836 (online)  \nCASE REPORT  \nInferior patella dislocation in an elderly patient after a fall: A case report  \nJoshua R Brooks, Alex G Pitman, Philip Lucas, Donald P Cawthorne, Stuart W T Wade  \nSpecialty type: Orthopedics  \nProvenance and peer review:  \nUnsolicited article; Externally peer reviewed.  \nPeer-review model: Single blind  \nPeer-review report’s classification Scientific Quality: Grade A, Grade A  \nNovelty: Grade A, Grade A  \nCreativity or Innovation: Grade A, Grade A  \nScientific Significance: Grade A, Grade A  \nP-Reviewer: Ali Shah F, Associate Professor, Pakistan  \nReceived: July 3, 2025  \nRevised: August 4, 2025  \nAccepted: October 29, 2025  \nPublished online: December 18, 2025  \nProcessing time: 166 Days and 17.4 Hours  \nJoshua R Brooks, Donald P Cawthorne, Department of Orthopaedics, Northern Beaches Hospital, Frenchs Forest 2086, New South Wales, Australia  \nAlex G Pitman, Philip Lucas, Stuart W T Wade, Department of Radiology, Northern Beaches Hospital, Frenchs Forest 2086, New South Wales, Australia  \nCorresponding author: Joshua R Brooks, Department of Orthopaedics, Northern Beaches Hospital, 105 Frenchs Forest Road West, Frenchs Forest 2086, New South Wales, Australia.  \n[joshua.brooks767@gmail.com](joshua.brooks767@gmail.com)  \nAbstract  \nBACKGROUND  \nInferior intra-articular patella dislocation is rare and comprises horizontal (type 1) and the more common vertical (type 2) dislocations in young and elderly patients respectively. In this case report, we describe a case of an elderly patient who presented with a type 2 dislocation after a fall. The mechanisms of inferior patella dislocation, their classification, key imaging features and treatment options are discussed.  \nCASE SUMMARY  \nA 75-year-old woman presented with a right knee fixed flexion deformity after a fall. Preoperative imaging confirmed a vertical intra-articular patella dislocation with a femoral trochlear osteochondral defect and lax though grossly intact patella tendon. Closed reduction was performed under general anaesthesia. Knee arthroscopy confirmed the presence of a femoral trochlear osteochondral defect whose edges were subsequently smoothed and there was debridement of scant debris with thorough irrigation of the joint. Postoperative imaging demonstrated anatomical alignment, however, there was a new nondisplaced medial femoral trochlear. The patient however was able to mobilise well in a range of motion brace set at 0-30 degrees and was discharged 1-day post operatively.  \nCONCLUSION  \nInferior patella dislocation is rare and this article highlights its types and imaging features which determine the most appropriate management.  \nKey Words: Knee; Patella; Dislocation; Intra-articular dislocation; Inferior dislocation; Case report  \n WJO  [https://www.wjgnet.com](https://www.wjgnet.com) 1 December 18, 2025  Volume 16  Issue 12   \nBrooks JR et al. Inferior patella dislocation  \n©The Author(s) 2025. Published by Baishideng Publishing Group Inc. All rights reserved.  \nCore Tip: Assessment of inferior patella dislocation should focus on the patella position, any fractures and the condition of the extensor mechanism. Closed reduction is possible in type 2 injuries (vertical orientation from osteophyte locking), however, success is dependent on the depth and size of the osteochondral defect and degree of patella rotation. Open reduction is recommended for type 1 (horizontal type) due to associated soft tissue injury which can be repaired. In type 2 injuries open reduction is recommended with large osteochondral defects requiring smoothing and or debridement, large osteophytes requiring resection or removal of intra-articular loose bodies.  \nCitation: Brooks JR, Pitman AG, Lucas P, Cawthorne D","cbCaicBgha1fI6fk","https://ap.wps.com/l/cbCaicBgha1fI6fk","pdf",5599714,"English","# Abstract\n## Background\n## Case summary\n## Conclusion\n# Introduction\n# Chief complaints\n# History of present illness\n# History of past illness\n# Personal and family history\n# Physical examination\n# Laboratory examinations\n# Imaging examinations","[{\"question\":\"What makes inferior intra-articular patella dislocation rare and how is it classified?\",\"answer\":\"It is rare and includes horizontal (type 1) and more common vertical (type 2) dislocations across young and elderly patients. The article focuses on the mechanisms, classification, imaging features, and management of these types.\"},{\"question\":\"How was the patient with a type 2 inferior dislocation treated?\",\"answer\":\"Closed reduction was performed under general anesthesia. Knee arthroscopy then confirmed a femoral trochlear osteochondral defect, followed by smoothing of the defect edges, debridement of debris, and thorough joint irrigation.\"},{\"question\":\"What factors determine management choice between closed and open reduction?\",\"answer\":\"For type 2 injuries, closed reduction can be successful, but depends on the depth and size of the osteochondral defect and the degree of patella rotation. Open reduction is recommended for type 1 injuries due to associated soft tissue injury, and for type 2 when large osteochondral defects, sizable osteophytes, or intra-articular loose bodies are present.\"}]","Inferior patella dislocation in an elderly patient after a fall - A case report | PDF",1790567624]