Question 517
{"accessible":true,"alternatives":[{"id":2593,"text":"choroid plexus papilloma"},{"id":2594,"text":"ependymoma"},{"id":2595,"text":"hemangioblastoma"},{"id":2596,"text":"medulloblastoma"},{"id":2597,"text":"subependymoma"}],"archived":false,"correctAlternativeId":2597,"explanation":"\u003cp\u003eSubependymomas are uncommon, benign (WHO grade I) tumors which are slow growing and non-invasive. They tend to occur in middle-aged and older individuals and are usually identified as an incidental finding.\u0026nbsp;\u003c/p\u003e\u003cp\u003eMacroscopically they appear as well circumscribed masses attached to the ventricular wall by a narrow pedicle.\u003c/p\u003e\u003cp\u003eThey are most commonly seen in the fourth ventricle\u0026nbsp;but can arise anywhere where there is ependyma.\u003c/p\u003e","id":517,"imageUrl":"https://prod-images-static.radiopaedia.org/images/375113/916cc8c0a253268800a55a587f37e0_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":9011},"imageAttributionCaseInfo":{"title":"Subependymoma","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":9011,"case_param":"subependymoma"},"firstQuestionPath":"/questions/1078","nextQuestionPath":"/articles/haemangioblastoma-central-nervous-system-2/questions/462","relatedArticles":[{"id":1290,"title":"Ependymoma","link":"/articles/ependymoma?lang=us"},{"id":4743,"title":"Subependymoma","link":"/articles/subependymoma?lang=us"},{"id":5335,"title":"Medulloblastoma","link":"/articles/medulloblastoma?lang=us"},{"id":8627,"title":"Choroid plexus papilloma","link":"/articles/choroid-plexus-papilloma-1?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA 55-year-old man with headaches is investigated with an MRI. What does the non-enhancing lesions shown on the accompanying T2 image most likely represent?\u0026nbsp;\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/517"}],"attemptsPercentages":[{"alternativeId":"2595","percentage":3},{"alternativeId":"2593","percentage":17},{"alternativeId":"2597","percentage":63},{"alternativeId":"2594","percentage":14},{"alternativeId":"2596","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"hemangioblastoma-central-nervous-system"}