The Great Barrier Reef is a very special place! It is not one continuous reef, but made up of over 2900 reefs and 900 islands. It is the largest reef structure and marine park in the world.he Great Barrier Reef is a very special place! It is not one continuous reef, but made up of over 2900 reefs and 900 islands. It is the largest reef structure and marine park in the world.
A meningioma is a tumor that arises from the meninges â the membranes that surround your brain and spinal cord. Most meningiomas are noncancerous (benign), though rarely a meningioma may be cancerous (malignant).Some meningiomas are classified as atypical, meaning they're neither benign nor malignant but, rather, something in between.ost meningiomas are noncancerous (benign), though rarely a meningioma may be cancerous (malignant). Some meningiomas are classified as atypical, meaning they're neither benign nor malignant but, rather, something in between.
Because meningiomas tend to grow inward, they commonly cause pressure on the brain or spinal cord. They can also grow outward causing the skull to thicken (hyperostosis). Figure 1. A meningioma is a tumor that grows from the dura covering of the brain and spinal cord. Meningiomas are named according to their location. Meningiomas are classified by their cell type and grade by viewing the cells taken during a biopsy under a microscope. Treatment varies depending on the grade of the meningioma.