9. Hutchinson-Gilford Progeria Syndrome
Hutchinson-Gilford Progeria Syndrome (HGPS) is a rare genetic disorder that causes rapid aging in children. Kids with progeria appear normal at birth, but begin showing signs of premature aging by the age of 2.
This includes hair loss, joint stiffness, and cardiovascular problems. Though there’s no cure, advancements in genetic research have given hope for treatments that could slow the progression of this heartbreaking disease.