John Lewis (D-GA) receives the Presidential Medal of Freedom — the country's highest civilian honor — from former U.S. President Barack Obama.

Civil rights icon and longtime US Democratic Rep. John Lewis of Georgia has been diagnosed with stage 4 pancreatic cancer, his office announced Sunday.

Lewis, 79, is a Democrat who has represented Georgia’s 5th Congressional District for over 30 years.

“This month in a routine medical visit, and subsequent tests, doctors discovered Stage IV pancreatic cancer. This diagnosis has been reconfirmed,” Lewis said in a statement.

“While I am clear-eyed about the prognosis, doctors have told me that recent medical advances have made this type of cancer treatable in many cases, that treatment options are no longer as debilitating as they once were, and that I have a fighting chance,” he added. “I have been in some kind of fight — for freedom, equality, basic human rights — for nearly my entire life. I have never faced a fight quite like the one I have now.”

The congressman has received an outpouring of support online from colleagues following the announcement.