DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Pituitary tumour. Coloured computed tomography (CT) scan of a section through the brain of an 84-year-old male patient with a tumour (round, centre) affecting the pituitary gland. Pituitary tumours are usually adenomas - benign (non-cancerous) tumours arising from glandular tissues.
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