[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-360482-105":59,"doc-detail-360482-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","incidental-high-grade-appendiceal-mucinous-neoplasm","Incidental High-Grade Appendiceal Mucinous Neoplasm","","High-grade appendiceal mucinous neoplasm (HAMN) is an uncommon epithelial appendix tumor positioned as an intermediate-risk lesion between low-grade appendiceal mucinous neoplasm (LAMN) and malignant adenocarcinoma. Diagnosis may be incidental on surveillance imaging or clinically mimic acute appendicitis with right-lower-quadrant pain or local organ pressure. This case reports a 50-year-old man with ESRD undergoing kidney transplant evaluation, where noncontrast CT found an incidental appendiceal mass treated surgically.",{"@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/incidental-high-grade-appendiceal-mucinous-neoplasm/360482/",{"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/incidental-high-grade-appendiceal-mucinous-neoplasm/360482.png","ImageObject",300,407,{"name":92,"@type":93},"Mabel","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-09-23",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",11,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is high-grade appendiceal mucinous neoplasm (HAMN)?","Question",{"text":113,"@type":114},"HAMN is an uncommon epithelial neoplasm of the appendix. It is positioned between LAMN and malignant adenocarcinoma in diagnostic risk.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"How was the appendiceal mass discovered in the case?",{"text":118,"@type":114},"A noncontrast CT abdomen during routine pretransplant imaging revealed an incidental appendiceal mass. The patient had no gastrointestinal symptoms.",{"name":120,"@type":111,"acceptedAnswer":121},"What treatment approach was used and what did pathology show?",{"text":122,"@type":114},"The patient underwent a robotic appendectomy with partial cecectomy. Pathology confirmed HAMN limited to the appendix with negative margins and no lymph node involvement (pN0).","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},360482,1790207414,{"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":39,"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":46},7971474920318,"https://ap-avatar.wpscdn.com/avatar/74000ee537e6b0ca360?x-image-process=image/resize,m_fixed,w_180,h_180&k=1788430171632181674","Use a QR scanner or camera to access more content from SLS  \nCASE REPORT  \nIncidental High-Grade Appendiceal Mucinous  \nNeoplasm  \nFarman H. Fatah, MD, Gazi B. Zibari, MD, Alana Hofmann, MD, Andrew Crane, MD, Anil Veluvolu, MD, Gregory Wellman, MD, Hosein Shokouh-Amiri, MD  \nABSTRACT  \nBackground: High-grade appendiceal mucinous neoplasm (HAMN) is an uncommon epithelial neoplasm of the appendix, and it is a median risk lesion that can be placed between benign low-grade appendiceal mucinous neoplasm (LAMN) and malignant adenocarcinoma. The diagnosis can be both incidental during surveillance imaging or clinically similar to acute appendicitis, which presents aspain in the right lower quadrant, or local pressure on adjacent organs. It carries the potential to progress to cancer if left untreated. Our aim is to review the literature and to report this rare tumor with outlining its clinical presentation, histologic features, and management.  \nCase Description: A 50-year-old man with end-stage renal disease (ESRD) on hemodialysis underwent evaluation for kidney transplantation. A noncontrast CT abdomen revealed an incidental appendiceal mass during routine pretransplant imaging. The patient was asymptomatic with no gastrointestinal complaints . We performed a robotic appendectomy with partial cecectomy. The size of the  \nDepartment of Surgery and Transplant, John C. McDonald Transplant Center, Willis Knighton Health System, Shreveport, Louisiana, USA. (Drs. Fatah, Zibari, Hofmann, Crane, and Shokouh-Amiri)  \nDepartment of Hematology/Oncology, Willis Knighton Health, Shreveport, Louisiana, USA. (Dr. Veluvolu)  \nDepartment of Pathology, Delta pathology, Shreveport, Louisiana, USA.(Dr. Wellman)  \nThis is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-ShareAlike 3.0 Unported license ([http://](http://)[ ](http://)[creativecommons.org/licenses/by-nc-sa/3.0/](creativecommons.org/licenses/by-nc-sa/3.0/)), which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original author and source are credited.  \nConflict of interests: none.  \nDisclosure: none.  \nFunding sources: none.  \nAcknowledgments: Figure 1B was Created Fatah F (2026), [https://BioRender.com/](https://BioRender.com/)[ ](https://BioRender.com/)[6kmu1h8.](6kmu1h8.)  \nAddress correspondence to: Dr. Zibari, Director John C McDonald Transplant Ctr, Acadeamic Chairman Department of Surgery, Willis Knighton Health, Shreveport, LA, USA.Telephone: 318-212-8350, E-mail: [gzibari@wkhs.com](gzibari@wkhs.com).  \nDOI: 10.4293/CRSLS.2026.00023  \n© 2026 by SLS, Society of Laparoscopic & Robotic Surgeons. Published by the Society of Laparoscopic & Robotic Surgeons.  \nmass was 10 􀀁 5.5 􀀁 3.5 cm. Pathology confirmed HAMN limited to the appendix, stage pTis (HAMN), with a negative margin and negative lymph nodes involvement pN0 . The patient recovered well, and he will be monitored for recurrence while awaiting the renal transplant.  \nConclusion: HAMN is a recently recognized diagnosis. It can progress to an aggressive nature if left untreated. A standard appendectomy is performed for appendix limited lesions with right hemicolectomy in the presence of invasive characteristics. A comprehensive screening and vigilant clinical evaluation are essential before transplantation.  \nKey Words: Appendiceal mass, ESRD, High-grade appendiceal mucinous neoplasms, Low-grade appendiceal mucinous neoplasm, Pseudomyxoma peritonei, Renal transplant.   \nINTRODUCTION  \nThe appendiceal tumors are uncommon, and account for roughly \u003C2% of appendiceal resections.1 The tumors are categorized as epithelial, neuroendocrine, goblet cell, mesenchymal, and lymphoid subtypes.2,3 Appendiceal mucinous neoplasms (AMNs) are epithelial tumors, which may vary from benign adenomas to malignant adenocarcinomas. The AMNs are diagnosed in approximately \u003C0.3% of appendiceal resections after the 50s with equal incidence among both males","cbCaicXLiY5qRvsx","https://ap.wps.com/l/cbCaicXLiY5qRvsx","pdf",1887564,"English","# Abstract\n# Background\n# Case Description\n# Conclusion","[{\"question\":\"What is high-grade appendiceal mucinous neoplasm (HAMN)?\",\"answer\":\"HAMN is an uncommon epithelial neoplasm of the appendix. It is positioned between LAMN and malignant adenocarcinoma in diagnostic risk.\"},{\"question\":\"How was the appendiceal mass discovered in the case?\",\"answer\":\"A noncontrast CT abdomen during routine pretransplant imaging revealed an incidental appendiceal mass. The patient had no gastrointestinal symptoms.\"},{\"question\":\"What treatment approach was used and what did pathology show?\",\"answer\":\"The patient underwent a robotic appendectomy with partial cecectomy. Pathology confirmed HAMN limited to the appendix with negative margins and no lymph node involvement (pN0).\"}]","Incidental High-Grade Appendiceal Mucinous Neoplasm | PDF",1790140232]