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.
What You Need to Know about Meningioma. 1  Meningioma is the most common type of primary brain tumor, accounting for approximately 30 percent of all brain tumors. 2  These tumors originate in the meninges, which are the outer three layers of tissue between the skull and the brain that cover and protect the brain just under the skull.