In-depth

Essential thrombocythemia

Essential thrombocythemia is an uncommon blood disorder in which your body makes too many platelets, which can cause abnormal blood clotting or bleeding.

Mitral valve stenosis

In mitral valve stenosis, the mitral valve is narrowed, obstructing blood flow between the chambers on the left side of the heart.

Pancreatic cancer

Pancreatic cancer is often fatal. Find out which new treatments offer hope.

Jun. 20, 2013