Question 2150
{"accessible":true,"alternatives":[{"id":10678,"text":"congenital renal anomaly"},{"id":10679,"text":"pelviureteric (PUJ) obstruction"},{"id":10680,"text":"renal ischemia"},{"id":10681,"text":"reflux nephropathy"},{"id":10682,"text":"vesicoureteric (VUJ) obstruction"}],"archived":false,"correctAlternativeId":10679,"explanation":"\u003cp\u003eThese images are from an infant with a functionally significant left PUJ obstruction (remember that in nuclear medicine imaging of the native kidneys images are acquired from posteriorly and radiological right and left is flipped!). There is reduced perfusion to the left kidney and reduced extraction of radiopharmaceutical from the blood stream, indicating functional impairment.\u003c/p\u003e\u003cp\u003eOver the course of the study, there is progressive retention of radiourine within the left collecting system, with a point of transition at the PUJ. There is no significant alteration to the appearance of the upper left collecting system following voiding or delayed imaging, indicating a high grade obstruction.\u0026nbsp;\u003c/p\u003e","id":2150,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/398/Renal_image_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":80275},"imageAttributionCaseInfo":{"title":"Pelviureteric obstruction - high-grade","contributor_name":"Sally Louise Ayesa","contributor_param":"sal-ayesa","case_rid":80275,"case_param":"pelviureteric-obstruction-high-grade"},"firstQuestionPath":"/questions/2150","nextQuestionPath":"/articles/pelviureteric-junction-obstruction-1/questions/2001","relatedArticles":[{"id":15558,"title":"Tc-99m MAG3","link":"/articles/tc-99m-mag3?lang=us"},{"id":91098,"title":"Renal imaging in nuclear medicine","link":"/articles/renal-imaging-in-nuclear-medicine?lang=us"}],"alsoUsedIn":[{"id":995,"kind":"Course","title":"2021 Virtual Conference Private Use - page 995","link":"https://radiopaedia.org/courses/2021-virtual-conference-private-use/pages/995"},{"id":995,"kind":"Course","title":"Radiopaedia 2021 - isoCME - page 995","link":"https://radiopaedia.org/courses/radiopaedia-2021-isocme/pages/995"},{"id":995,"kind":"Course","title":"2022 Virtual Conference Private Use - page 995","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/995"},{"id":970,"kind":"RestrictedPage","title":"Page 970 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/970"},{"id":955,"kind":"RestrictedPage","title":"Page 955 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/955"},{"id":1,"kind":"LiveSchedule","title":"1","link":"https://radiopaedia.org/admin/live_schedules/1"},{"id":69,"kind":"LiveSchedule","title":"69","link":"https://radiopaedia.org/admin/live_schedules/69"},{"id":920,"kind":"Course","title":"Radiopaedia 2021 - isoCME - page 920","link":"https://radiopaedia.org/courses/radiopaedia-2021-isocme/pages/920"},{"id":920,"kind":"Course","title":"2021 Virtual Conference Private Use - page 920","link":"https://radiopaedia.org/courses/2021-virtual-conference-private-use/pages/920"},{"id":920,"kind":"Course","title":"Nuclear Medicine Lectures - page 920","link":"https://radiopaedia.org/courses/nuclear-medicine-lectures/pages/920"}],"stem":"\u003cp\u003eA dynamical renal study using Tc-99m MAG3 was performed in an infant patient. What is the most likely diagnosis based on the images below?\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/2150"}],"attemptsPercentages":[{"alternativeId":"10682","percentage":7},{"alternativeId":"10681","percentage":4},{"alternativeId":"10678","percentage":5},{"alternativeId":"10679","percentage":82},{"alternativeId":"10680","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"pelviureteric-junction-obstruction"}