Here is what I found...
Atherosclerosis, in which arteries narrow and become less flexible,
occurs when fat, cholesterol, and other substances in the blood form
plaque that builds up in the walls of arteries. The opening inside the
arteries narrows as plaque builds up, and blood can no longer flow
properly to various parts of the body. Smoking increases the formation
of plaque in blood vessels.
Coronary Heart Disease occurs when arteries that carry blood to the
heart muscle are narrowed by plaque or blocked by clots. Chemicals in
cigarette smoke cause the blood to thicken and form clots inside veins and
arteries. Blockage from a clot can lead to a heart attack and sudden death.
Stroke is a loss of brain function caused when blood flow within the
brain is interrupted. Strokes can cause permanent brain damage and
death. Smoking increases the risk for strokes. Deaths from strokes are
more likely among smokers than among former smokers or people who
have never smoked.
Peripheral Arterial Disease (PAD) and peripheral vascular disease occur
when blood vessels become narrower and the flow of blood to arms, legs,
hands and feet is reduced. Cells and tissue are deprived of needed oxygen
when blood flow is reduced. In extreme cases, an infected limb must be
removed. Smoking is the most common preventable cause of PAD.
Abdominal Aortic Aneurysm is a bulge or weakened area that occurs
in the portion of the aorta that is in the abdomen. The aorta is the main
artery that carries oxygen-rich blood throughout the body. Smoking is a
known cause of early damage to the abdominal aorta, which can lead to
an aneurysm. A ruptured abdominal aortic aneurysm is life-threatening;
almost all deaths from abdominal aortic aneurysms are caused by
smoking. Women smokers have a higher risk of dying from an aortic
aneurysm than men who smoke. Autopsies have shown early narrowing
of the abdominal aorta in young adults who smoked as adolescents.
Here are five diseases instead of four. I apologize but I found nothing that only had four.
