India, Dec. 11 -- Former NBA center Jason Collins disclosed on Thursday that he has been diagnosed with Stage 4 glioblastoma.

In September, the NBA had announced that Collins was receiving treatment for a brain tumor. However, on Thursday, the 13-year NBA veteran provided further information regarding his diagnosis, treatment, and prognosis.

Speaking to ESPN's Ramona Shelburne, Collins said, "But now it's time for people to hear directly from me. I have Stage 4 glioblastoma, one of the deadliest forms of brain cancer. It came on incredibly fast."

"What makes glioblastoma so dangerous is that it grows within a very finite, contained space -- the skull -- and it's very aggressive and can expand. What makes it so difficult to treat in my ...