The earlobe has a unique structure. It contains no cartilage and is supplied by very small end arteries without backup circulation. Because of this, changes in blood flow or vessel health may show up there earlier than in other parts of the body.
Researchers believe Frank’s Sign may reflect microvascular damage—the same type of blood vessel changes seen in atherosclerosis, the process that underlies many forms of heart disease.
Conditions Linked to Frank’s Sign
Frank’s Sign is not a diagnosis, but studies have found associations with several cardiovascular and metabolic conditions, including:
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