New twists to an old technique reveal a better understanding of disease pathology and new therapeutic avenues.

A proof-of-concept study uses a strategy similar to the way tumors evade immune detection. The new limbs survive for more than 200 days.

Researchers can print cells and biomaterials that make up human tissues, but there’s still a long way to go before fully functional organs can be made to order.

Several early-stage clinical trials indicate that implanting patients with the cells is safe. But whether they can alleviate neurological problems remains to be seen.

The patient’s vision has improved since the procedure, and her cornea remains clear.

Scientists are devising human-animal hybrids for harvesting human organs, but lab-derived mini-organs are a less ethically fraught solution to meeting the need for transplantation.

Insulin-producing cells grown in the lab could offer a functional cure for the disease.

Primates receiving heart transplants from genetically engineered pigs have survived more than six months, a new study reveals.

Blind rats are made to see after sheets of cells implanted into their eyes make themselves at home.