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.
Benign brain tumors do not contain cancer cells and are usually slow growing. Brain tumors fall into two different categories: primary or metastatic. Primary brain tumors begin within the brain. A metastatic tumor is formed when cancer cells located elsewhere in the body break away and travel to the brain.