[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-422266-105":59,"doc-detail-422266-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","the-carcinoma-mimic-a-case-of-breast-fibromatosis","The Carcinoma Mimic - A Case of Breast Fibromatosis","","Fibromatosis of the breast is a rare, locally aggressive stromal disease that can mimic carcinoma on imaging. A 17-year-old woman presented with a painless, palpable 8 cm left-breast lump. Ultrasound suggested malignancy with a large irregular hypoechoic mass, yet absence of a hyperechoic halo, posterior acoustic attenuation, and low vascularity supported fibromatosis. MRI showed T2 hyperintensity and T1 hypointensity, with progressive enhancement rather than carcinoma washout kinetics. Core needle biopsy confirmed the diagnosis. ",{"@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/the-carcinoma-mimic-a-case-of-breast-fibromatosis/422266/",{"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/the-carcinoma-mimic-a-case-of-breast-fibromatosis/422266.png","ImageObject",300,407,{"name":92,"@type":93},"Well Done","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-28",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},"Why can breast fibromatosis mimic carcinoma on imaging?","Question",{"text":113,"@type":114},"Breast fibromatosis frequently presents as a firm, irregular mass with indistinct margins, overlapping with invasive carcinoma appearance on imaging.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What ultrasound features supported fibromatosis instead of malignancy in this case?",{"text":118,"@type":114},"Despite an irregular hypoechoic mass concerning for cancer, the lack of a hyperechoic halo, posterior acoustic attenuation, and low vascularity favored the correct diagnosis.",{"name":120,"@type":111,"acceptedAnswer":121},"How did MRI enhancement kinetics help distinguish fibromatosis from breast carcinoma?",{"text":122,"@type":114},"On MRI, the lesion demonstrated progressive enhancement, contrasting with the typical washout kinetics expected for breast carcinoma.","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},422266,1790764714,{"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":29,"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":145,"preview_page_count":4},5909892210082,"https://ap-avatar.wpscdn.com/avatar/56001069da27c9f41e8?x-image-process=image/resize,m_fixed,w_180,h_180&k=1789614185077863061","Review began 10/17/2025  \nReview ended 12/03/2025  \nPublished 12/04/2025  \n© Copyright 2025  \nDraper et al. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0. , which permits unrestricted use , distribution , and reproduction in any medium , provided the original author and source are credited.  \nDOI: 10.7759/cureus.98431  \nOpen Access Case Report  \nThe Carcinoma Mimic: A Case of Breast Fibromatosis  \nAllison Draper 1 , Madeleine Hotaling 2, Elise Hotaling 3  \n1. General Surgery, Broward Health, Fort Lauderdale, USA 2. Jupiter Environmental Research and Field Studies Academy, Jupiter High School, Jupiter, USA 3. Breast Imaging, Virtual Radiologic, Jupiter, USA  \nCorresponding author: Allison Draper, [adraper@browardhealth.org](adraper@browardhealth.org)  \nAbstract  \nFibromatosis ofthe breast is a rare and locally aggressive disease that mimics carcinoma on imaging. We present a case of a 17-year-old female who presented with a painless, palpable 8 cm lump in her left breast. Breast ultrasound highlighted features concerning for malignancy-a large, irregular, hypoechoic mass with posterior acoustic shadowing. However, the absence of a hyperechoic halo, presence of posterior acoustic attenuation, and low vascularity pointed towards the correct diagnosis. In addition, on magnetic resonance imaging (MRI), breast fibromatoses correspond to hyperintense signals on T2, which, though a nonspecific finding, may be seen with myxoid tissue and hypointense signals on T1. Following contrast administration, there was progressive enhancement as opposed to the typical washout kinetics of breast carcinoma. Diagnosis of breast fibromatosis was confirmed on core needle biopsy. Although the differential for an irregular hypoechoic breast mass should be broad, it can be narrowed with history and radiographic findings. This case report highlights the unique ultrasound and MRI findings seen in breast fibromatoses to spread awareness of active surveillance and improve early detection.  \nCategories: General Surgery, Radiology, Oncology  \nKeywords: breast cancer, breast fibromatosis, breast surgical oncology, desmoid tumor, diagnostic radiology, diagnostic radiology education  \nIntroduction  \nFibromatosis of the breast is a rare, benign, stromal tumor characterized by fibroblastic proliferation withinfiltrative growth. These lesions account for less than 0.2% of all breast tumors and can occur secondary to prior trauma or may be linked to mutations resulting in dysregulation of β-catenin [1-2]. Although histologically nonmalignant, these lesions are locally aggressive and have a strong tendency for recurrence following surgical excision. Breast fibromatoses most commonly present in women between their fourth and fifth decades of life, and can provide quite a diagnostic dilemma.  \nClinically and radiographically, breast fibromatosis frequently mimics invasive carcinoma, presenting as a firm, irregular mass with indistinct margins on imaging [2] . Because of this overlap, patients may undergo extensive diagnostic workup or surgical excision before a definitive diagnosis is made. This workup exposes the patient to unnecessary risk, especially for a benign condition that will often go unchanged or even spontaneously resolve. Recognition of characteristic imaging findings and correlation with patient history are key to narrowing the differential before tissue confirmation. We present a case of breast fibromatosis ina 17-year-old female, highlighting the diagnostic considerations and imaging features that help distinguish this entity from malignancy.  \nCase Presentation  \nA 17-year-old female presented in January of 2024 with a painless, palpable lump in the upper-outer quadrant of her left breast discovered on self-exam. The patient had no prior trauma or medical problems, no family history of breast or ovarian cancer, and no prior pregnancies. She had regular menstrual cyclesand had never been ","cbCaie0L0P96sBFH","https://ap.wps.com/l/cbCaie0L0P96sBFH","pdf",3018173,"English","# Abstract\n# Introduction\n# Case Presentation\n## Clinical presentation\n## Ultrasound findings\n## MRI findings\n# How to cite\n# Figures","[{\"question\":\"Why can breast fibromatosis mimic carcinoma on imaging?\",\"answer\":\"Breast fibromatosis frequently presents as a firm, irregular mass with indistinct margins, overlapping with invasive carcinoma appearance on imaging.\"},{\"question\":\"What ultrasound features supported fibromatosis instead of malignancy in this case?\",\"answer\":\"Despite an irregular hypoechoic mass concerning for cancer, the lack of a hyperechoic halo, posterior acoustic attenuation, and low vascularity favored the correct diagnosis.\"},{\"question\":\"How did MRI enhancement kinetics help distinguish fibromatosis from breast carcinoma?\",\"answer\":\"On MRI, the lesion demonstrated progressive enhancement, contrasting with the typical washout kinetics expected for breast carcinoma.\"}]","The Carcinoma Mimic - A Case of Breast Fibromatosis | PDF",1790626675,15]