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A 31-year-old man presented with bilateral quadriceps tendon ruptures and hyperparathyroidism secondary to parathyroid carcinoma. The injury occurred after attempting to lift a small wooden log. Multidisciplinary management included bilateral tendon repairs, tumor resection, and restoration via oncological and endocrinological care, with follow-up reported 15 years after surgery.",{"@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/simultaneous-bilateral-quadriceps-tendon-rupture-secondary-to-parathyroid-carcinoma-a-case-report/406287/",{"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/simultaneous-bilateral-quadriceps-tendon-rupture-secondary-to-parathyroid-carcinoma-a-case-report/406287.png","ImageObject",300,407,{"name":92,"@type":93},"Elsa","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-03","2026-09-28",true,{"@type":102,"interactionType":103,"userInteractionCount":44},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What caused the patient’s simultaneous bilateral quadriceps tendon ruptures?","Question",{"text":112,"@type":113},"The case attributes the ruptures to systemic effects of parathyroid carcinoma causing hyperparathyroidism. The injury happened after the patient attempted to lift a small wooden log.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How was the diagnosis confirmed in the report?",{"text":117,"@type":113},"Radiographs and MRI of both knees demonstrated quadriceps tendon rupture patterns. Abnormal laboratory values and further evaluation supported hypercalcemic crisis related to the underlying condition.",{"name":119,"@type":110,"acceptedAnswer":120},"What treatments were performed for this patient?",{"text":121,"@type":113},"The report describes bilateral quadriceps tendon repairs and tumor resection, followed by oncological and endocrinological restoration. 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Farrah, MD  \nBrian J. Zirgibel, MD Phillip R. Worts, PhD, ATC  Carlos A. Zapata, MD Andrew M. Wong, MD  \nFrom the Ocala Health Trauma, Ocala Regional Medical Center, Ocala, FL (Dr. Farrah); the Department of Surgery, University of South Florida College of Medicine, Tampa, FL (Dr. Farrah); the Department of Surgery, University of Central Florida College of Medicine, Orlando, FL (Dr. Farrah); the Tallahassee Orthopedic Clinic, Tallahassee, FL (Dr. Zirgibel, Dr. Worts, and Dr. Wong); the Department of Clinical Sciences (Dr. Zirgibel and Dr. Wong); the Department of Nutrition and Integrative Physiology, The Florida State University, Tallahassee, FL (Dr. Worts); the Institute of Sports Sciences and Medicine, The Florida State University, Tallahassee, FL (Dr. Worts); and the Northwest Florida Diagnostic Endocrinology, Tallahassee, FL (Dr. Zapata) .  \nCorrespondence to Dr. Worts: Phillip. [Worts@teamTOC.com](Worts@teamTOC.com)  \nNone of the following authors or any immediate family member has received anything of value from or has stock or stock options held in a commercial company or institution related directly or indirectly to the subject of this article:  \nDr. Farrah, Dr. Zirgibel, Dr. Worts, Dr. Zapata, and Dr. Wong.  \nJAAOS Glob Res Rev 2023;7: e23 .00016 DOI: 10.5435/JAAOSGlobal-D-23-00016  \nCopyright 2023 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Orthopaedic Surgeons. This is an open access article distributed under the Creative Commons Attribution-NoDerivatives License 4.0 (CC BY-ND) which allows for redistribution, commercial and noncommercial, as long as it is passed along unchanged and in whole, with credit to the author.  \nABSTRACT  \nSimultaneous bilateral quadriceps tendon ruptures are a rare occurrence commonly associated with a traumatic event or systemic disease. A 31-year-old man presented with simultaneous bilateral quadriceps tendon ruptures with associated hyperparathyroidism secondary to parathyroid carcinoma. The injury occurred after the patient attempted to lift a small wooden log from the ground. We discussed the multidisciplinary management of this patient resulting in bilateral quadriceps tendon repairs, tumor resection, and oncological and endocrinological restoration. Clinical follow-up is reported at 15 years after surgery. Parathyroid carcinoma is an extremely rare cancer and rarely the cause of hyperparathyroidism. The systemic effects of the tumor eventually lead to the rupturing of both quadriceps tendons. Orthopaedic physicians must remain vigilant in identifying the root cause of injuries that are atypical in nature.  \nS  \nimultaneous bilateral quadriceps tendon ruptures (BQTR) is a debilitating injury associated with trauma and systemic disease. 1,2 Obesity, diabetes mellitus, chronic renal failure, hyperparathyroidism,  \nhypertension, and anabolic steroid use are commonly associated risk factors. 1,2 Simultaneous BQTR is rare, as a recent study found only 105 cases in English and German literature.1 Parathyroid carcinoma is also a very rare condition that may result in hyperparathyroidism, with ,0.1% of hyperparathyroidism cases attributed to parathyroid carcinoma.3,4  \nThe presentation of a patient with simultaneous BQTR and parathyroid carcinoma is reported. To date, several cases of simultaneous BQTR have been reported in individuals with hyperparathyroidism; however, only one other case (ie, a brief editorial) was attributed to parathyroid carcinoma.2,5 The patient provided written informed consent for this case to be reported.  \nCase Report  \nA 31-year-old man presented to an orthopaedic clinic with a sudden onset of severe bilateral knee pain and weakness after routine yard work. The patient  \nSimultaneous Bilateral Quadriceps Tendon Rupture  \nreported lifting a lightweight wooden log from the ground and then felt a painful","cbCaitzlGG84KKjU","https://ap.wps.com/l/cbCaitzlGG84KKjU","pdf",481065,"English","# Abstract\n# Case Report\n## Patient Presentation and History\n## Examination and Imaging\n## Laboratory Findings and Diagnostic Workup","[{\"question\":\"What caused the patient’s simultaneous bilateral quadriceps tendon ruptures?\",\"answer\":\"The case attributes the ruptures to systemic effects of parathyroid carcinoma causing hyperparathyroidism. The injury happened after the patient attempted to lift a small wooden log.\"},{\"question\":\"How was the diagnosis confirmed in the report?\",\"answer\":\"Radiographs and MRI of both knees demonstrated quadriceps tendon rupture patterns. Abnormal laboratory values and further evaluation supported hypercalcemic crisis related to the underlying condition.\"},{\"question\":\"What treatments were performed for this patient?\",\"answer\":\"The report describes bilateral quadriceps tendon repairs and tumor resection, followed by oncological and endocrinological restoration. Clinical follow-up was reported 15 years after surgery.\"}]","Simultaneous Bilateral Quadriceps Tendon Rupture Secondary to Parathyroid Carcinoma - A Case Report | PDF",1790564628,13]