A 21-year-old Chicago man who began college at age 9 and medical school three years later is about to become the youngest person to earn an M.D. at the University of Chicago.

Sho Yano will graduate this week from the Pritzker School of Medicine, where he also received a Ph.D. in molecular genetics and cell biology.

Yano graduated with honors from Loyola University after just three years before starting medical school at age 12. The Chicago Tribune reports that some schools didn't admit Yano because of concerns that such rigorous training could interfere with his adolescent development.

Yano is preparing to begin his residency training in pediatric neurology.