Young children who experience a prolonged separation from a parent are at risk for learning problems as they enter school.

Researchers from Stanford University have developed an artificial cornea, which they say could make cornea transplants involving donors a thing of the past and help millions of blind people see again.

Vitamin D deficiency is common among women diagnosed with breast cancer, and it may raise the risk of cancer spread and death, researchers report.

A test that characterizes early lung tumors by their genetic fingerprint may help identify patients whose cancer is most likely to spread, researchers report.

The FDA is highlighting the risk of miscarriage and birth defects in women taking the immune-suppressing drugs CellCept or Myfortic.