DIFFICULTY IN DIFFERENTIATING BETWEEN FOURTH VENTRICLE AND BRAIN STEM MASSES.
D001932:Brain Neoplasms; D001933:Brain Stem; D002551:Cerebral Ventricle Neoplasms; D014695:Cerebral Ventriculography; D020546:Fourth Ventricle; D006801:Humans; D011859:Radiography
BRAIN NEOPLASMS; BRAIN STEM; CEREBRAL VENTRICLE NEOPLASMS; VENTRICULOGRAPHY