Longtime venture capitalist Ron Conway said Friday that he was “recently diagnosed with a rare form of cancer.”

In a post on X, Conway wrote that he “will be stepping back from some of my usual activities,” but he will “continue to support” founders backed by his firm SV Angel: “With a more focused and balanced schedule, I can prioritize treatments while helping SV Angel founders at inflection points like we always do!”

Conway also said SV Angel will be “unchanged,” as his son Topher Conway “has made all of our investment decisions for the better part of the last decade.” And he noted that another son, Ronny Conway, joined as a managing partner in 2024.

“They bring experience from nearly every major technology cycle in Silicon Valley and are now focused on partnering with founders building the future of AI,” Conway said.

He added that he’s not revealing “the specific type of cancer” in his diagnosis, because he doesn’t want “speculation” about the prognosis, but he said he remains “optimistic.”

“I am fortunate to have the best/amazing team of UCSF doctors in San Francisco, and as you know, I never back down from a fight,” Conway said.