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The non-dysraphic type usually affects adults without vertebral anomalies and is extremely uncommon in the thoracic region. Here, a 51-year-old woman with severe obesity, diabetes, and prior cauda equina injury developed progressive right-dominant periumbilical dysesthesia. Imaging showed a thoracic intradural extramedullary mass consistent with lipoma, treated by partial decompression with long-term follow-up.",{"@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/non-dysraphic-thoracic-spinal-lipoma-in-an-obese-adult-woman-a-case-report/459098/",{"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/non-dysraphic-thoracic-spinal-lipoma-in-an-obese-adult-woman-a-case-report/459098.png","ImageObject",300,407,{"name":92,"@type":93},"CatatanPagi","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",13,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"What is a non-dysraphic thoracic spinal lipoma?","Question",{"text":113,"@type":114},"It is a rare benign tumor formed by abnormal proliferation of mature adipose tissue within the spinal canal, occurring in adults without vertebral anomalies. Thoracic involvement is particularly uncommon.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What symptoms and imaging findings were reported in this case?",{"text":118,"@type":114},"The patient developed progressive right-dominant periumbilical dysesthesia for about two years. Neurologic exam showed right-sided sensory changes, and MRI demonstrated an intradural extramedullary mass at Th8-9 consistent with spinal lipoma.",{"name":120,"@type":111,"acceptedAnswer":121},"How was the condition treated and what was the outcome?",{"text":122,"@type":114},"A wide laminectomy at Th7-8 and dome laminectomies at Th6 and Th9 were performed, with partial resection for decompression. Postoperatively, truncal dysesthesia resolved, no new neurological deficits occurred, and no recurrence was seen on MRI during the one-year follow-up.","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},459098,1790792733,{"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":34,"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},962090894170,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Review began 11/11/2025  \nReview ended 12/09/2025  \nPublished 12/09/2025  \n© Copyright 2025  \nAbe 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.98832  \nOpen Access Case Report  \nNon-dysraphic Thoracic Spinal Lipoma in an Obese Adult Woman: A Case Report  \nMitsuyoshi Abe 1, Yuki Sakaeyama 1, Ryo Matsuzaki 1, Shuhei Kubota 1, Nobuo Sugo 1  \n1. Neurosurgery, Toho University, Tokyo, JPN  \nCorresponding author: Nobuo Sugo, [nsugo@med.toho-u.ac.jp](nsugo@med.toho-u.ac.jp)  \nAbstract  \nSpinal lipoma is a rare benign tumor characterized by abnormal proliferation of mature adipose tissue within the spinal canal. The non-dysraphic type typically occurs in adults without vertebral anomalies and is extremely rare at the thoracic level. We report a case that developed in the setting of severe obesity, suggesting a possible link between obesity and tumor progression. A 51-year-old woman (152 .2 cm, 81.3 kg, BMI 35 . 1) with a history of diabetes and prior lumbar disc surgery resulting in cauda equina injury presented with progressive right-dominant periumbilical dysesthesia for two years. Neurological examination revealed right-sided hypoalgesia at the Th7-L1 dermatomes. Thoracic MRI revealed a well-demarcated intradural extramedullary mass on the right side at the Th8-9 level, showing hyperintensity on both T 1-and T2-weighted images and hypointensity on fat-suppressed sequences, consistent with a spinal lipoma. CT demonstrated no bony abnormalities or evidence of spinal dysraphism. Under general anesthesia, a wide laminectomy at Th7-8 and dome laminectomies at Th6 and Th9 were performed. A yellowish, soft fatty mass was found firmly adherent to the spinal nerve roots. A partial resection was performed for decompression, leaving a small portion of fatty tissue caudally. Histopathological examination confirmed lipoma.  \nPostoperatively, the patient’s truncal dysesthesia entirely resolved with no new neurological deficits; bladder and rectal dysfunction remained unchanged. No recurrence was observed on MRI during the oneyear follow-up. This rare case of non-dysraphic thoracic spinal lipoma occurred in the setting of severe obesity. Obesity and weight fluctuations may have contributed to tumor growth and symptom progression; partial decompression with long-term MRI follow-up is recommended.  \nCategories: Neurology, Neurosurgery, Orthopedics  \nKeywords: non-dysraphic type, obesity, spinal lipoma, spinal tumor, thoracic spine  \nIntroduction  \nSpinal lipoma is a rare benign tumor characterized by the abnormal proliferation of mature adipose tissue within the spinal canal, accounting for less than 1% of all spinal cord tumors [1] . These lesions are broadly classified into dysraphic and non-dysraphic types. Dysraphic lipomas are typically associated with neural tube closure defects such as spina bifida and usually present in childhood. In contrast, non-dysraphic spinal lipomas occur in the absence of vertebral anomalies and are generally diagnosed in adulthood [2,3] . Their embryological origin is thought to involve aberrant inclusion of ectodermal or mesenchymal elements during neurulation, distinguishing them from dysraphic variants.  \nNon-dysraphic lipomas have been reported at various levels of the spinal axis, including the cervical, thoracic, and thoracolumbar regions; however, thoracic involvement remains particularly uncommon [3,4] . Although rare, several adult thoracic cases have been documented, underscoring the importance of recognizing this entity in clinical practice.  \nRecent literature has suggested that obesity and metabolic abnormalities may influence the behavior of spinal lipomas, including potential enlargement or symptom progression [5] . However, these associations remain speculative, and causa","cbCaiuB3ma7KY3Ss","https://ap.wps.com/l/cbCaiuB3ma7KY3Ss","pdf",4954721,"English","# Abstract\n# Introduction\n# Case Presentation\n# How to cite this article","[{\"question\":\"What is a non-dysraphic thoracic spinal lipoma?\",\"answer\":\"It is a rare benign tumor formed by abnormal proliferation of mature adipose tissue within the spinal canal, occurring in adults without vertebral anomalies. Thoracic involvement is particularly uncommon.\"},{\"question\":\"What symptoms and imaging findings were reported in this case?\",\"answer\":\"The patient developed progressive right-dominant periumbilical dysesthesia for about two years. Neurologic exam showed right-sided sensory changes, and MRI demonstrated an intradural extramedullary mass at Th8-9 consistent with spinal lipoma.\"},{\"question\":\"How was the condition treated and what was the outcome?\",\"answer\":\"A wide laminectomy at Th7-8 and dome laminectomies at Th6 and Th9 were performed, with partial resection for decompression. Postoperatively, truncal dysesthesia resolved, no new neurological deficits occurred, and no recurrence was seen on MRI during the one-year follow-up.\"}]","Non-dysraphic Thoracic Spinal Lipoma in an Obese Adult Woman - A Case Report | PDF",1790755197,18]