SOVEREIGN / ISM / SCIENCE PHOTO LIBRARY SOVEREIGN / ISM / SCIENCE PHOTO LIBRARY
Benign brain tumour. Coloured magnetic resonance imaging (MRI) scan of an axial section through the head of a 62-year-old woman with a large choroid plexus papilloma (CPP, orange, lower right) in the posterior horn of the brain's left ventricle. CPP is a rare slow-growing benign (non-cancerous) tumour that is commonly located in the ventricular system of the choroid plexus.
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