By Matt Audilet Basketball legend Dikembe Mutombo is undergoing treatment for a brain tumor. The NBA released a statement to the public on behalf of Mutumbo and his family on Saturday: “NBA Global Ambassador and Basketball Hall of Famer Dikembe Mutombo is currently undergoing treatment for a brain tumor. He is receiving the best care possible from a collaborative team of specialists in Atlanta and is in great spirits as he begins treatment. Dikembe and his family ask for privacy during this time so they can focus on his care. They are grateful for your prayers and good wishes.” After he was se…