What diseases have been cured with stem cell research? No diseases have been entirely cured with embryonic or adult stem cells. Adult stem cell research has provided highly beneficial treatments for blood-related diseases; unfortunately, it hasn't shown promise outside the universe of blood-related diseases. Scientists want to pursue embryonic stem cell research because they believe the cells offer great promise for a broad range of diseases due to their rapid growth and pluripotency. Many of the world's leading scientists believe that the relatively young science of embryonic stem cell research holds the greatest promise for developing new treatments and cures.