An intraosseous ependymal cyst.
D002648:Child; D003560:Cysts / Q000473:pathology*; D004806:Ependymoma / Q000473:pathology*; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging* / Q000473:pathology*; D008297:Male; D009457:Neuroglia / Q000473:pathology; D011859:Radiography; D014054:Tomography