[Doughnut sign in brain scanning (author's transl)].
D000293:Adolescent; D000328:Adult; D001254:Astrocytoma / Q000175:diagnosis; D001922:Brain Abscess / Q000175:diagnosis; D001927:Brain Diseases / Q000175:diagnosis*; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002543:Cerebral Hemorrhage / Q000175:diagnosis; D002561:Cerebrovascular Disorders / Q000175:diagnosis; D003397:Craniopharyngioma / Q000175:diagnosis; D005260:Female; D006406:Hematoma / Q000175:diagnosis; D006801:Humans; D008297:Male; D008579:Meningioma / Q000175:diagnosis / Q000473:pathology; D008875:Middle Aged; D009837:Oligodendroglioma / Q000175:diagnosis / Q000473:pathology; D011877:Radionuclide Imaging