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Medical records of 30 patients with third ventricular colloid cysts at Jagadguru Jayadeva Murugarajendra Medical College, Davangere, from 2017 to 2024 were reviewed. Imaging characteristics including cyst size, anatomical location, and related complications were analyzed. Cysts larger than 10 mm, situated in high-risk regions, and seen in younger patients showed higher likelihood of complications, especially acute hydrocephalus. Findings support MRI for detailing signal characteristics, cyst contents, and subtle variations, enabling imaging-based risk stratification and timely management to prevent sudden clinical deterioration.",{"@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/imaging-characteristics-of-colloid-cysts-a-case-series-correlating-cyst-size-and-location-with-associated-acute-hydrocephalus/454848/",{"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/imaging-characteristics-of-colloid-cysts-a-case-series-correlating-cyst-size-and-location-with-associated-acute-hydrocephalus/454848.png","ImageObject",300,407,{"name":92,"@type":93},"Cart","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-05","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What imaging modalities are evaluated for colloid cyst diagnosis and risk assessment?","Question",{"text":112,"@type":113},"The study evaluates CT and MRI for identifying colloid cysts and assessing their association with hydrocephalus.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which factors increase the likelihood of associated acute hydrocephalus in this study?",{"text":117,"@type":113},"Colloid cysts larger than 10 mm, located in high-risk anatomical regions, and observed in younger patients were more likely to develop complications, including acute hydrocephalus.",{"name":119,"@type":110,"acceptedAnswer":120},"How is acute hydrocephalus defined in the study?",{"text":121,"@type":113},"Acute hydrocephalus is defined as an Evans Index ≥ 0.30 and/or radiologic evidence of transependymal CSF flow.","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},454848,1791174092,{"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":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":52,"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},18829141979164,"https://eur-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Review began 10/12/2025  \nReview ended 12/02/2025  \nPublished 12/08/2025  \n© Copyright 2025  \nVarma S 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.98691  \nOpen Access Original Article  \nImaging Characteristics of Colloid Cysts: A Case Series Correlating Cyst Size and Location With Associated Acute Hydrocephalus  \nRavichandra Varma S 1, Rahul Suresh 1, Jeevika Ujjappa 1  \n1. Radiodiagnosis, Jagadguru Jayadeva Murugarajendra Medical College, Davangere, IND Corresponding author: Ravichandra Varma S, [dr.rcvrd1993@gmail.com](dr.rcvrd1993@gmail.com)  \nAbstract  \nThis retrospective study evaluates the diagnostic role of CT and MRI in identifying colloid cysts and assessing their association with hydrocephalus. Data from 30 patients diagnosed with third ventricular colloid cysts at Jagadguru Jayadeva Murugarajendra Medical College, Davangere, between 2017 and 2024 were reviewed. Imaging characteristics, including cyst size, location, and potential complications such as hydrocephalus, were analyzed. Colloid cysts larger than 10 mm, located in high-risk regions, and observed in younger patients were more likely to develop complications, including acute hydrocephalus. Asymptomatic cysts exceeding 10 mm in high-risk zones warrant regular imaging follow-up and timely surgical intervention, if necessary, to prevent sudden clinical deterioration. The findings highlight MRI’s superiority in demonstrating signal characteristics, cyst contents, and subtle variations, making it valuable for planning management strategies. Overall, larger cyst size and high-risk anatomical positioning strongly correlate with symptomatic presentation and complications, emphasizing the importance of early identification, imagingbased risk stratification, and vigilant monitoring to prevent catastrophic outcomes.  \nCategories: Radiology  \nKeywords: colloid cyst, high-risk zones, hydrocephalus, mri, third ventricle  \nIntroduction  \nColloid cysts are benign, slow-growing lesions located in the anterior third ventricle, most commonly near the foramen of Monro, an anatomically critical region for CSF circulation [1,2] . Although histologically nonneoplastic and frequently asymptomatic, their strategic location can lead to intermittent or persistent obstruction of CSF flow, resulting in ventriculomegaly, elevated intracranial pressure (ICP), or acute obstructive hydrocephalus [3,4] . In rare cases, rapid neurological deterioration and sudden death have been reported [5] . Clinical presentation ranges from incidental radiologic findings to acute neurological emergencies, underscoring the importance of early identification to prevent irreversible outcomes.  \nColloid cysts account for approximately 0.5-2% of intracranial tumors and are most commonly identified in young to middle-aged adults, although they may occur at any age [1-3]. Histologically, they consist of epithelial-lined cystic structures containing viscous gelatinous material composed of cholesterol crystals, mucopolysaccharides, and proteinaceous debris [6] . Despite their benign nature, their proximity to the foramen of Monro can result in clinically significant CSF obstruction and potentially catastrophic consequences [3,5] .  \nThe pattern of obstruction may vary. Some cysts exhibit a “ball-valve” mechanism, producing episodic or positional symptoms [4,5] . Symptomatic patients may present with persistent headache, nausea, vomiting, gait imbalance, visual disturbances, memory deficits, or altered sensorium. Acute obstruction of CSF pathways may result in severe hydrocephalus, coma, herniation, or death if intervention is delayed [2,4] . Even when detected incidentally, lesions displaying high-risk imaging features require close clinical and radiologic surveillance.  \nNeuroimaging ","cbCaiku3DmceDD6S","https://ap.wps.com/l/cbCaiku3DmceDD6S","pdf",2642093,"English","# Abstract\n# Introduction\n# Materials And Methods","[{\"question\":\"What imaging modalities are evaluated for colloid cyst diagnosis and risk assessment?\",\"answer\":\"The study evaluates CT and MRI for identifying colloid cysts and assessing their association with hydrocephalus.\"},{\"question\":\"Which factors increase the likelihood of associated acute hydrocephalus in this study?\",\"answer\":\"Colloid cysts larger than 10 mm, located in high-risk anatomical regions, and observed in younger patients were more likely to develop complications, including acute hydrocephalus.\"},{\"question\":\"How is acute hydrocephalus defined in the study?\",\"answer\":\"Acute hydrocephalus is defined as an Evans Index ≥ 0.30 and/or radiologic evidence of transependymal CSF flow.\"}]","Imaging Characteristics of Colloid Cysts: A Case Series - Correlating Cyst Size and Location With Associated Acute Hydrocephalus | PDF",1790741491,25]