ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Brain tumour. X-ray of a section through the skull of a 42-year-old patient, showing a large osteomeningioma (bright, lower right) in the region of the medial and frontal lobes. Meningiomas are tumours arising from the meninges - the membrane layers surrounding the brain and spinal cord of the central nervous system (CNS). Here, it is also affecting the brain of the skull. Meningiomas are usually benign (non-cancerous) but a small percentage are cancerous.
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