The venerated news anchor announces his battle with multiple myeloma.

The media world was floored last month when Tom Brokaw—the venerated NBC News Correspondent and one of the most trusted figures in broadcast journalism—revealed his almost year-long battle with multiple myeloma, a form of cancer affecting blood cells in the bone marrow. But Brokaw remains hopeful about his prognosis and delivered the distressing news in a positive way. “I am very optimistic about the future and look forward to continuing my life, my work and adventures still to come,” said the 73-year-old news anchor in a statement. What is multiple myeloma, exactly? Tune in below as oncologist Dr. Lawrence Piro explains everything you need to know about this blood disease, including signs, symptoms and treatment options. This article originally appeared as on Spry Living