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.
Enlarge image. The most common type of primary brain tumor is the meningioma, a noncancerous tumor that arises from the abnormal growth of the cells that form the delicate outer covering of the brain, called the meninges.Approximately 96% of meningiomas occur within the skull, with the remaining 4% involving the spinal column.nlarge image. The most common type of primary brain tumor is the meningioma, a noncancerous tumor that arises from the abnormal growth of the cells that form the delicate outer covering of the brain, called the meninges.