Michael Tilson Thomas has been open about his glioblastoma diagnosis with his many fans around the world.

He recently posted a letter on this website:

“Dear Friends,

Three years ago, I wrote to tell you that I’m battling Glioblastoma. The three and a half years since the initial diagnosis have been a special time in my life, filled with friends, family, and music. They have also been challenging, as I had to undergo a second operation and manage complications from the treatments that have held the tumor at bay.

My doctors have informed me that the tumor has returned. We continue to work with the superb group at the UCSF Brain Tumor Center. There are treatment options, but the odds are uncertain…

Now is the time to wind down my public appearances. During the past year, I had the opportunity to come full circle with musicians and orchestras I hold most dear. My work with the London Symphony Orchestra, New York Philharmonic, Chicago Symphony, and the Los Angeles Philharmonic was very special. In March, I have concerts planned with the New World Symphony and, on April 26, the San Francisco Symphony is celebrating my 80th birthday. At that point, we all get to say the old show business expression, “It’s a wrap.”

A “coda” is a musical element at the end of a composition that brings the whole piece to a conclusion. A coda can vary greatly in length. My life’s coda is generous and rich.”

Read the full letter on his website.