Which are the symptoms of Familial Hypercholesterolemia?

Familial Hypercholesterolemia is a genetic disorder characterized by exceptionally high levels of low-density lipoprotein (LDL) cholesterol from birth, which often leads to premature cardiovascular disease. The most characteristic symptoms are physical manifestations of cholesterol deposits, such as tendon xanthomas and corneal arcus, though many individuals remain asymptomatic until a cardiac event occurs.

What are the primary symptoms of Familial Hypercholesterolemia?

Because Familial Hypercholesterolemia is a "silent" condition, most patients do not feel symptoms until significant arterial damage has occurred. However, clinical indicators of Familial Hypercholesterolemia include:

• Tendon Xanthomas: Cholesterol deposits that appear as firm, painless lumps on the Achilles tendons or the knuckles of the hands.


• Corneal Arcus: A white or gray opaque ring around the iris, often occurring before age 45.


• Xanthelasmas: Small, yellowish cholesterol deposits under the skin near the eyelids.


• Premature Atherosclerosis: The hardening of arteries that can lead to chest pain (angina) or heart attacks at a young age.

How does symptom severity vary in patients?

The severity of Familial Hypercholesterolemia depends heavily on whether the patient has the heterozygous form (inherited from one parent) or the much rarer, more severe homozygous form (inherited from both). Patients with the homozygous form of Familial Hypercholesterolemia may develop severe cardiovascular symptoms, including aortic stenosis, during childhood or early adolescence, while those with the heterozygous form may not experience symptoms until middle age.

When should I seek immediate medical attention?

If you have been diagnosed with Familial Hypercholesterolemia, you must seek emergency care if you experience symptoms of a heart attack or stroke. These include sudden chest pain or pressure, shortness of breath, radiating pain in the jaw or left arm, sudden weakness, or difficulty speaking. Early and consistent monitoring is the best defense against these life-threatening events.

Next steps

• Consult a lipidologist or cardiologist to develop a personalized lipid-lowering treatment plan.


• Undergo cascade screening to ensure family members are also tested for Familial Hypercholesterolemia.


• Connect with the 14 members of the DiseaseMaps community to share experiences and coping strategies.


• Maintain a heart-healthy lifestyle, including a low-saturated fat diet and regular, physician-approved exercise.

Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Familial Hypercholesterolemia


• Orphanet: Familial Hypercholesterolemia (ORPHA:437)


• The FH Foundation: Understanding FH


• OMIM (Online Mendelian Inheritance in Man): #143890