Michael Tilson Thomas is recovering after a successful surgery to remove a brain tumor.

On Friday, August 6, his representatives noted that the Los Angeles-born conductor had surgery on an undisclosed date and will undergo therapy for several months.

As a result, the conductor has canceled all performances through November, including engagements with the National Symphony Orchestra, the Indianapolis Symphony Orchestra, the New World Symphony, and the Chicago Symphony Orchestra.

In a statement, Tilson Thomas said, “I deeply regret missing projects that I was greatly anticipating.  I look forward to seeing everyone again in November.”

Tilson Thomas is a well-known composer, pianist, and interpreter of Gustav Mahler. He recently stepped down as the San Francisco Symphony Orchestra’s Music Director and became the organization’s music director laureate.

Update:

Tilson Thomas took to Twitter posting, “Dear friends and music lovers,
I recently returned home from the UCSF Medical Center. After a series of tests, it was diagnosed that I had a brain tumor and that an immediate operation was necessary. The operation was successful. I’m embarking on a course of therapy for the next several months. This means that I must curtail my public appearances through the end of October. I plan to return to the stage in November. am very fortunate to be cared for by the excellent team at UCSF and their national and international collaborators. Thank you for your love and prayers. See you soon!“