Fibrous dysplasia is a chronic disorder in which an abnormal development of fibrous tissue causes bones to expand. Any bone can be affected. More than one bone can be affected at any one time, and, when multiple bones are affected, it is not unusual for them to all be on one side of the body. However, fibrous dysplasia does not spread from one bone to another.

An enchondroma is a type of noncancerous bone tumor that begins in cartilage. An enchondroma most often affects the cartilage that lines the inside of the bones. It often affects the tiny long bones of the hands and feet. It may also affect other bones such as the femur (thighbone), humerus (upper arm bone), or tibia (one of the two lower leg bones).

G6PD deficiency is an inherited condition. It is when the body doesn’t have enough of an enzyme called G6PD. Here's what you need to know about this condition.

Do cellphones interfere with pacemakers? Do ICDs need to be adjusted? Here are answers to these and other questions.

Folate deficiency is the lack of folic acid in the blood. Folic acid is a B vitamin needed to make normal red blood cells. Low levels can cause megaloblastic anemia. Read on to learn more.

A pregnancy is divided into 3 phases, called trimesters. Each trimester has its own major milestones.

Detailed information on abdominal aortic aneurysm, including causes, symptoms, diagnosis, and treatment.

A cerebral aneurysm is a bulge in a weak area of the wall of a brain artery. Learn about this condition, including cause, risk factors, symptoms, diagnosis, and treatment.

Ataxia means without coordination. People with ataxia lose muscle control in their arms and legs, which may lead to a lack of balance, coordination, and trouble walking. Ataxia may affect the fingers, hands, arms, legs, body, speech, and even eye movements.