ANDRE LABBE, ISM / SCIENCE PHOTO LIBRARY ANDRE LABBE, ISM / SCIENCE PHOTO LIBRARY
Hydrocephalus due to brain tumour. Axial magnetic resonance imaging (MRI) scan through the brain of a 3-year-old boy who has hydrocephalus caused by a brainstem tumour (a medulloblastoma). Also known also as 'water on the brain', hydrocephalus is an accumulation of cerebrospinal fluid (CSF) within the brain. Medulloblastomas are most common in children and tend to grow rapidly, spreading across the brain and spinal cord. Treatment involves anti-cancer drugs, radiotherapy and surgery.
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