Homozygous familial hypercholesterolaemia. Report of three cases

S K Mishra1, T K Bose, B S Das

  • 1Medical Service, Ispat General Hospital, Rourkela.

Insights

Homozygous familial hypercholesterolaemia, a rare genetic disorder, affects one in a million people. This report details three cases, including a fatal myocardial infarction in a young male and xanthomata in a 12-year-old girl.

Area of Science:

  • Cardiovascular Medicine
  • Genetics
  • Metabolic Disorders

Background:

  • Familial hypercholesterolaemia (FH) is an autosomal dominant genetic disorder.
  • Homozygous familial hypercholesterolaemia (HoFH) is a severe, rare form of FH, affecting approximately 1 in a million individuals.
  • HoFH is characterized by extremely elevated low-density lipoprotein cholesterol (LDL-C) levels from birth, leading to premature cardiovascular disease.

Observation:

  • This report presents three cases of HoFH from two distinct families.
  • A 25-year-old male experienced extensive myocardial infarction, resulting in a fatal outcome.
  • A 14-year-old male and a 12-year-old female presented with characteristic features, including multiple planar xanthomata and tuberose xanthomata.

Findings:

  • The presented cases highlight the severe clinical manifestations of HoFH, including premature cardiovascular events.
  • Xanthomata, indicative of severe hyperlipidemia, were observed in pediatric and adolescent patients.
  • The fatal outcome in the young adult underscores the aggressive nature of untreated or inadequately treated HoFH.

Implications:

  • Early diagnosis and aggressive management of HoFH are crucial to prevent premature cardiovascular complications.
  • Genetic counseling and cascade screening are essential for families with HoFH.
  • Further research into novel therapeutic strategies for HoFH is warranted to improve patient outcomes.

Related Concept Videos

Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Cholesterol: Significance and Regulation01:29

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Blood Studies for Cardiovascular System III: Serum Lipid Profile01:25

Blood Studies for Cardiovascular System III: Serum Lipid Profile

Understanding serum lipids is crucial for maintaining cardiovascular health and preventing heart disease and stroke.
Serum lipids are fats and fatty substances in the blood and are crucial for various bodily functions, including energy storage, cellular structure, and hormone production. Serum lipids consist of cholesterol, triglycerides, and phospholipids.
Cholesterol is a soft, fat-like substance found in all body cells. It is crucial for producing hormones, vitamin D, and substances that aid...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
Jaundice01:25

Jaundice

Jaundice, or icterus, is the yellow discoloration of the skin, sclerae, and mucous membranes. It happens when plasma bilirubin levels rise above 2.5-3 mg/dL, leading to bilirubin deposition in tissue.Bilirubin is a byproduct of hemoglobin degradation. In macrophages, hemoglobin breaks down into globin and heme. Globin is converted into amino acids, while heme is turned into biliverdin by heme oxygenase, which is then reduced to unconjugated bilirubin by biliverdin reductase.Unconjugated...
Cholecystitis01:20

Cholecystitis

Cholecystitis is inflammation of the gallbladder, most commonly caused by obstruction of the cystic duct. This blockage prevents bile from draining, leading to gallbladder distension, inflammation, and potentially serious complications. This condition may present acutely or chronically and can happen with or without gallstones.EtiologyAbout 95% of cholecystitis cases are calculous, caused by gallstones blocking the cystic duct, leading to bile accumulation and inflammation of the gallbladder...