Atrial fibrillation, or AFib, is a kind of abnormal heart rhythm or arrhythmia. AFib increases the risk for blood clots. These clots can then travel to the brain, causing a stroke. This is why AFib significantly increases the risk for stroke.

Joints are the areas where 2 or more bones meet. Most joints are mobile, allowing the bones to move.

Located almost in the center of the chest, the adult human heart is about the size of a fist.

Rhinitis is when a reaction occurs that causes a stuffy nose, runny nose, sneezing, and itching. Most types of rhinitis are caused by inflammation. Here's what you need to know.

Symptoms of a latex allergy include watery or itchy eyes, wheezing, hives, flushing or a skin rash, itching, and swelling.

Breast cancer in men is rare—less than 1% of all breast cancer occurs in men.

Detailed information on mammograms, including the different types, how a mammogram is done, and recommended screening guidelines.

Whenever the normal drainage pattern in the lymph nodes is disturbed or damaged - often during surgery to remove the lymph nodes - the arm may swell. This swelling, caused by too much fluid, is called lymphedema.

Detailed information on breast health, anatomy of the breast, breast development, breast cancer prevention, common breast conditions, and breast cancer in males and females

Osteosarcoma often affects the long bones around the knee. It happens most often in children, teens, and young adults.