Former U.S. President Jimmy Carter got some good news Tuesday: Doctors in Atlanta said that there was no evidence his liver and brain cancer had spread and that he was responding well to treatment.

Cancer experts who are not involved in treating Carter said the report was the best news he could possibly have received.

Doctors: No Signs Jimmy Carter's Cancer Is Spreading

They said that while Carter was not cancer-free, no cancer was growing, and the condition wasn't getting worse.

Doctors: No Signs Jimmy Carter's Cancer Is Spreading

Carter publicly revealed his illness in August.

Doctors: No Signs Jimmy Carter's Cancer Is Spreading

Carter, who was U.S. president from 1977 until 1981, has been one of the most active and high-profile ex-presidents in history — writing books, negotiating freedom for U.S. hostages in North Korea, and founding the Carter Center humanitarian organization.

He has helped build homes for poor families even while undergoing cancer treatment.