whats frank's sign

Frank’s sign is a diagonal crease on the earlobe that runs from the tragus (the little cartilage in front of the ear canal) toward the back or lower edge of the earlobe, and it has been studied as a possible marker of cardiovascular disease risk.

What exactly is Frank’s sign?

• It’s a visible diagonal line or wrinkle on the earlobe.
• Typically runs from the tragus across the lobule toward the rear or lower border of the earlobe.

• It can be single or sometimes double on the same earlobe, and may be on one side (unilateral) or both (bilateral).

Doctors also call it the “diagonal earlobe crease” (DELC).

Why do people care about it?

Researchers have noticed that people with Frank’s sign often have higher rates of:

• Coronary artery disease (blocked heart arteries)

• Other cardiovascular problems or cardiovascular death in some autopsy studies

• Possible links to diabetes and premature aging of blood vessels and skin.

Recent autopsy-based work has found a significantly higher prevalence of Frank’s sign in people who died of cardiovascular causes, and an association with severe coronary artery blockage.

How strong is the evidence?

This is where it gets nuanced:

• Several studies and reviews have found an association between Frank’s sign and coronary artery disease or cardiovascular mortality.

• Other studies, especially in specific groups like people with type 2 diabetes, have not found a meaningful link.

• Diagnostic performance is modest: one study in angina patients reported sensitivity around 65% and specificity around 38% for detecting significant coronary artery disease, with an area under the ROC curve close to 0.5 (essentially weak standalone discrimination).

Most modern authors emphasize that:

• Frank’s sign should not be used alone to diagnose heart disease.
• At best, it may be a small extra clue, alongside age, blood pressure, cholesterol, smoking, family history, etc.

So if you notice it on yourself?

If you see a diagonal earlobe crease on yourself or someone else:

• It does not automatically mean you have heart disease.
• But if you also have risk factors (smoking, high blood pressure, high cholesterol, diabetes, strong family history, chest discomfort, shortness of breath, unusual fatigue), it’s reasonable to talk to a doctor about a heart risk checkup.

Think of Frank’s sign less as a “diagnosis” and more as a possible nudge to take cardiovascular risk seriously and make sure all the usual screening boxes are ticked.

Information gathered from public forums or data available on the internet and portrayed here.