It’s real. It’s rare. It’s deadly. This puff of smoke is here to stay.

Photo courtesy of Peter O’Donnell Jr. Brain Institute

“It sounds like Mahi-mahi! Is it named after the fish?”

“I’ve never heard of it…”

“What does it mean?”

Moyamoya is a Japanese word that means “puff of smoke” and describes the appearance of tiny capillaries that form to compensate for vascular blood vessels that thicken and close — the…