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A member asked:

How rare is it to have a simian crease (a single palmar crease) on both palms without having down syndrome?

A doctor has provided 1 answer

Fairly common: A single sided simian crease is found in about 10% of the population, whereas having it on both palms is found in about 5%. When a condition is seen in this many people, it is considered somewhat common. Many more people who have a simian crease have normal chromosomes than have down syndrome.

Dr Ali and another doctor agreed

Answered 11/15/2016

5.4k views

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