[Cardhu]

Progeria is caused by a specific gene mutation that happens during development but what causes that mutation is not known.

[sauropod]

Pray for that family.

[CitizenM]

How sad.

[Pearls Before Swine]

Progeria is caused by a specific gene mutation that happens during development...

Do you know what that gene is responsible for when it works properly?

As an aside, all I know about progeria I learned from watching "Bladerunner." In other words, essentially nothing.