Dr. John William Duff MD

The ABO (A, B, AB, or O) blood group system is used to classify different types of antibodies in the plasma and antigens in the red blood cells (RBCs). The ABO blood group and RhD antigen determine the type of blood that is a perfect match for blood transfusions. The four ABO blood groups are: ...

What is bursitis?Bursitis is a condition that causes inflammation of the bursa. Once the bursa is inflamed, it starts swelling. It causes pain around the affected area. The condition affects any part of the body where there are bursae.What is a bursa?A bursa is a sac-like cavity filled with fluid....

For good health, strong bones are important. Bone mineral density(BMD) is the best way to measure the health of the bones. It is a comparison of the person's bone density or mass to that of a healthy person who is of the same age and sex. Bone mineral density can show whether a person has...

Causes of Fainting A person faints or loses consciousness for a brief time when the brain does not get enough oxygen. Fainting or passing out is also medically called syncope. Before fainting, people may experience lightheadedness, dizziness, weakness, and nausea. Others describe fainting as...

Many women have a difficult time during their periods, and sometimes, some may confuse painful symptoms they are experiencing for simply being part and parcel of women's normal menstrual woes without suspecting that the symptoms might be due to an aggressive form of endometriosis. Endometriosis can...

The Nature of Cancerous CellsEvery cell in the human body is programmed to carry out a specific role. For example, a red blood cell carries oxygen to tissues, a white blood cell wards off infection, and an intestinal cell absorbs nutrients in the digestive tract. All these cells are programmed to...