San Francisco Symphony Conductor Michael Tilson Thomas’ brain tumor has returned, he says, and the 80-year-old intends to lead his final performance in April.

Famed conductor and longtime director of the San Francisco Symphony Michael Tilson Thomas announced that his brain tumor has returned and that he is planning to lead his final performance in April.

On his website, conductor and composer Michael Tilson Thomas announced he would “wind down my public appearances” over the next two months.