Hypercholesterolemia

Hypercholesterolemia is a form of hyperlipidemia characterized by elevated levels of cholesterol in the blood, primarily due to increased low-density lipoprotein (LDL) particles, and is a major modifiable risk factor for atherosclerosis and cardiovascular disease. It can be classified as primary (genetic, such as familial hypercholesterolemia) or secondary (resulting from conditions like diabetes, hypothyroidism, or renal disease). Cholesterol is transported in the bloodstream via lipoproteins, with dietary cholesterol absorbed in the intestine and packaged into chylomicrons, which are then processed through the lymphatic system and degraded in peripheral tissues by lipoprotein lipase, ultimately delivering remnants to the liver. The condition has become increasingly treatable with statins, and diagnostic thresholds have been progressively lowered due to improved understanding of its role in cardiovascular pathology.