[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-454272-105":59,"doc-detail-454272-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","heparin-induced-thrombocytopenia-causing-early-venous-thrombosis-and-free-flap-failure-after-mandibular-reconstruction-case-report","Heparin-Induced Thrombocytopenia Causing Early Venous Thrombosis and Free Flap Failure After Mandibular Reconstruction - Case Report","","Heparin-induced thrombocytopenia (HIT) is an under-recognized cause of early microvascular thrombosis and free flap loss after head and neck reconstruction. The report describes a 45-year-old man undergoing fibula free flap mandibular reconstruction who, within 72 hours after perioperative heparin exposure, developed recurrent venous thrombosis and persistent flap congestion despite repeated re-explorations. Marked platelet fall, a high 4Ts score, and positive anti-platelet factor 4/heparin testing supported HIT. Despite escalation to critical care, the patient progressed to multiorgan failure and died on postoperative day 7. The case emphasizes immediate HIT consideration in microsurgical patients with repeated venous thrombosis and preserved inflow, including stopping all heparin and starting a non-heparin anticoagulant while arranging confirmatory testing and early hematology involvement. A practical timeline, platelet decline pattern, 4Ts scoring, and a differential approach to postoperative thrombocytopenia support rapid recognition and management.",{"@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/heparin-induced-thrombocytopenia-causing-early-venous-thrombosis-and-free-flap-failure-after-mandibular-reconstruction-case-report/454272/",{"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/heparin-induced-thrombocytopenia-causing-early-venous-thrombosis-and-free-flap-failure-after-mandibular-reconstruction-case-report/454272.png","ImageObject",300,407,{"name":92,"@type":93},"Sophia Brooks","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-30",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 condition did the patient develop shortly after heparin exposure?","Question",{"text":112,"@type":113},"He developed heparin-induced thrombocytopenia (HIT), accompanied by recurrent venous thrombosis and persistent flap congestion.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How was HIT assessed in this case?",{"text":117,"@type":113},"The platelet count fell markedly; the 4Ts score indicated high pretest probability, and anti-platelet factor 4/heparin testing returned positive.",{"name":119,"@type":110,"acceptedAnswer":120},"What management steps does the case emphasize for similar microsurgical patients?",{"text":121,"@type":113},"Promptly consider HIT, stop all heparin (including flushes), start a non-heparin anticoagulant while arranging confirmatory testing, and involve hematology early.","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},454272,1790816762,{"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":44,"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":143,"read_time":144,"preview_page_count":4},962084925636,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Review began 11/26/2025  \nReview ended 12/04/2025  \nPublished 12/07/2025  \n© Copyright 2025  \nAbdel Aziz et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CCBY 4.0. , which permits unrestricted use , distribution , and reproduction in any medium , provided the original author and source are credited.  \nDOI: 10.7759/cureus.98630  \nOpen Access Case Report  \nHeparin-Induced Thrombocytopenia Causing Early Venous Thrombosis and Free Flap Failure After Mandibular Reconstruction: A Case Report  \nKhalid Abdel Aziz 1, Faris Abdon 2, Mohamed Salim 3  \n1. Plastic and Reconstructive Surgery Department, Al Qassimi Hospital, Sharjah, ARE 2. Medical Sciences Department/Medical Biochemistry Unit, Orotta College of Medicine and Health Sciences, Asmara, ERI 3 . Plastic Surgery Department, Sharg Alneel Teaching Hospital, Khartoum, SDN  \nCorresponding author: Faris Abdon, [farismabdon@gmail.com](farismabdon@gmail.com)  \nAbstract  \nHeparin-induced thrombocytopenia (HIT) is an under-recognized cause of early microvascular thrombosis and free flap loss after head and neck reconstruction. We report a 45-year-old man who underwent fibula free flap mandibular reconstruction and, within 72 hours of perioperative heparin exposure, developed recurrent venous thrombosis and persistent flap congestion despite multiple re-explorations. The platelet count fell markedly, the 4Ts score indicated a high pretest probability of HIT, and anti-platelet factor 4/heparin testing subsequently returned a positive result. Despite critical care escalation, the patient progressed to multiorgan failure and died on postoperative day 7. This case underscores that in microsurgical patients, repeated venous thrombosis with preserved inflow should prompt the immediate consideration of HIT: stop all heparin (including flushes), begin a non-heparin anticoagulant while arranging confirmatory testing, and involve hematology early. We outline a practical timeline, platelet fall, 4Ts scoring, and differential diagnosis for postoperative thrombocytopenia to aid in the rapid recognition and management of similar cases.  \nCategories: Plastic Surgery, Hematology, Oral Medicine  \nKeywords: 4ts score, argatroban, direct thrombin inhibitor, free flap, free tissue transfer, heparin-induced thrombocytopenia, mandibular reconstruction, microvascular thrombosis, platelet factor 4 antibodies  \nIntroduction  \nMicrovascular tissue transfer remains the gold standard in oral cavity reconstruction [1,2] . It has a high success rate (95-99%) [3], yet unpredictable complications such as heparin-induced thrombocytopenia (HIT) can severely compromise outcomes [4] . HIT is an immune-mediated disorder characterized by antibodies that target complexes of heparin and platelet factor 4 (PF4) [5,6], causing profound platelet activation and a hypercoagulable state [7] . Although rare, with an incidence ranging from 0.2% to 5% in patients receiving heparin, HIT remains significantly underdiagnosed and may result in catastrophic thrombotic events [8] .  \nMandibular free flap reconstruction is increasingly planned with multi-step virtual workflows (e.g., virtual surgical planning with cutting guides and staged osteotomies), which can lengthen operations and complicate postoperative surveillance. In such pathways, systemic causes of thrombosis, like HIT, may be overlooked if flap congestion is attributed solely to anastomotic or mechanical factors. Contemporary reviews of virtual surgical planning in maxillofacial reconstruction highlight the complexity of the workflow and the need for structured perioperative monitoring [9, 10] .  \nA unique aspect of HIT is the timing of the immune response, which typically occurs within 5-14 days postheparin exposure but can manifest rapidly upon re-exposure to heparin within hours [8] . Early clinical recognition (guided by the widely recommended 4Ts scoring system (thrombocytopenia, timing of platelet count fall, thromb","cbCaiugkQFn5BXtv","https://ap.wps.com/l/cbCaiugkQFn5BXtv","pdf",5607441,"English","# Abstract\n# Introduction\n# Case Presentation\n## Table 1: Hematology and coagulation values\n# How to cite this article","[{\"question\":\"What condition did the patient develop shortly after heparin exposure?\",\"answer\":\"He developed heparin-induced thrombocytopenia (HIT), accompanied by recurrent venous thrombosis and persistent flap congestion.\"},{\"question\":\"How was HIT assessed in this case?\",\"answer\":\"The platelet count fell markedly; the 4Ts score indicated high pretest probability, and anti-platelet factor 4/heparin testing returned positive.\"},{\"question\":\"What management steps does the case emphasize for similar microsurgical patients?\",\"answer\":\"Promptly consider HIT, stop all heparin (including flushes), start a non-heparin anticoagulant while arranging confirmatory testing, and involve hematology early.\"}]","Heparin-Induced Thrombocytopenia Causing Early Venous Thrombosis and Free Flap Failure After Mandibular Reconstruction - Case Report | PDF",1790740425,23]