<unk>  <unk>  or triple A) is a localized enlargement of the<unk>  aorta such that the diameter is greater than 3 cm or more than 50% larger than normal. They usually cause no symptoms, except during rupture. Occasionally,<unk> , back, or leg pain may occur. Large<unk> s can sometimes be felt by pushing on the abdomen. Rupture may result in pain in the abdomen or back, low blood pressure, or loss of consciousness, and often results in death.<unk> s occur most commonly in those over 50 years old, in men, and among those with a family history. Additional risk factors include smoking, high blood pressure, and other heart or blood vessel diseases. Genetic conditions with an increased risk include Marfan syndrome and Ehlers-Danlos syndrome.<unk> s are the most common form of<unk><unk> . About 85% occur below the kidneys with the rest either at the level of or above the kidneys. In the United States, screening with<unk>  ultrasound is recommended for males between 65 and 75 years of age with a history of smoking. In the United Kingdom and Sweden, screening all men over 65 is recommended. Once an<unk>  is found, further ultrasounds are typically done on a regular basis. Not smoking is the single best way to prevent the disease. Other methods of prevention include treating high blood pressure, treating high blood cholesterol, and not being overweight. Surgery is usually recommended when the diameter of an<unk>  grows to >5.5 cm in males and >5.0 cm in females. Other reasons for repair include the presence of symptoms and a rapid increase in size, defined as more than one centimeter per year. Repair may be either by open surgery or endovascular<unk>  repair (EVAR). As compared to open surgery, EVAR has a lower risk of death in the short term and a shorter hospital stay, but may not always be an option. There does not appear to be a difference in longer-term outcomes between the two. Repeat procedures are more common with EVAR.<unk> s affect 2-8% of males over the age of 65. They are five times more common in men. In those with an<unk>  less than 5.5 cm, the risk of rupture in the next year is below 1%. Among those with an<unk>  between 5.5 and 7 cm, the risk is about 10%, while for those with an<unk>  greater than 7 cm the risk is about 33%. Mortality if ruptured is 85% to 90%. During 2013,<unk><unk> s resulted in 168,200 deaths, up from 100,000 in 1990. In the United States<unk> s resulted in between 10,000 and 18,000 deaths in 2009.
Abdominal aortic aneurysm
Appendicitis
Superior mesenteric artery syndrome
Splenic infarction
Aortoenteric fistula
Postcholecystectomy syndrome
Renal vein thrombosis
Spontaneous bacterial peritonitis