Monteggia variant fracture is a Monteggia fracture (proximal third ulna fracture with radial head dislocation) with an associated radial head fracture, coronoid fracture or complex pattern of injury. We report a rare case of an 80-year-old lady with a right Monteggia variant fracture with an ipsilateral distal radius and ulna fracture leading to a floating forearm injury. To our knowledge, this is the first case report to describe this injury pattern. We describe the multidisciplinary team approach and detailed surgical technique in managing this rare and complex injury.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9891395PMC
http://dx.doi.org/10.7759/cureus.33263DOI Listing

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Introduction: In 1814, Giovanni Battista Monteggia first described the fracture pattern which was further characterized by Luis Bado in 1967. Bado also coined the term Monteggia equivalent which includes a spectrum of complex fracture patterns and dislocations of the proximal ulna and radius. Monteggia equivalent lesions in adults are rare with different injury mechanisms compared to children, and thus having different management procedures.

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Objective: Monteggia fracture-dislocation variants have been well documented in adults, but most of the literature in the pediatric population is in the form of case reports. These injuries present differently in children due to the presence of immature radiocapitellar epiphyses and the flexibility of the joint that is more prone to subluxation, contributing to occult presentations and/or misdiagnoses. The purpose of this study is to investigate the outcomes and complications of true Monteggia fracture-dislocations compared with their variants in the pediatric population.

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Monteggia fracture-dislocation is an inherently unstable injury in the elbow region, characterized by a fracture of the proximal ulna associated with dislocation of the radial head, often with high rates of postoperative complications. Some variants of this injury involve a combination with a fracture of the radial head, which further complicates the scenario, often requiring multiple surgical approaches, increasing soft tissue damage, and promoting a higher risk of complications. The objective of this study is to report the case of a patient undergoing surgical intervention through a posterior approach to the elbow, during which radial head arthroplasty and ulna osteosynthesis were performed.

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Case: An 18-year-old right-handed male student presented after a road-traffic-accident; he had type-II Monteggia fracture dislocation associated with ipsilateral type-I capitellum fracture and comminuted lateral condyle avulsion fracture. He underwent open reduction and fixation of ulna with 3.5 DCP with autologous olecranon bone grafting and fixation of capitellum using Herbert screw along with lateral collateral ligament (LCL) repair using fiber wire.

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Article Synopsis
  • Complex elbow dislocations, particularly those with ulna fractures, are challenging to classify and treat, fitting into categories such as Monteggia variant injuries or trans-olecranon fractures.
  • A systematic review of 16 studies encompassing 296 cases aimed to assess the outcomes of these injuries, with a focus on the more severe trans-ulnar basal coronoid fracture dislocations.
  • Findings indicated that trans-ulnar basal coronoid injuries had significantly higher rates of complications (40%) and reoperations (25%) compared to trans-olecranon (11%, 18%) and Monteggia variant injuries (25%, 13%).
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