OBP reads like batting average, but because it incorporates walks, OBPs are about 60 points higher on average. So the equivalent of a .300 hitter should have a .360 OBP or so. Getting on base is an important skill, so you want to use OBP to determine if the player in question is a good offensive performer.
Primary brain tumors are those that arise within the brain itself, unlike metastatic tumors that travel to the brain from a distant site. The most common types of primary brain tumors in adults are gliomas, glioblastomas, and lymphomas.
In children, some of the most common types of primary brain tumors are: 1  Astrocytomas. 2  These form from star-shaped brain cells called astrocytes. 3  They can be cancerous and low-grade (more common in children) or high-grade (more common in adults).