Progeria, also known as Hutchinson-Gilford progeria syndrome (HGPS) or the "Benjamin Button" disease, is a rare genetic disorder that causes rapid aging in children. The disease is caused by a genetic mutation and is characterized by symptoms such as hair loss, thinning bones, and cardiovascular disease. The most common type of progeria syndrome is Hutchinson-Gilford progeria syndrome, which is a rare and fatal genetic disorder. Another type of progeria syndrome is Wiedemann-Rautenstrauch syndrome, which appears in children while they are still in the womb. The adult version of progeria syndrome is Werner syndrome, which is characterized by symptoms that normally occur in teenagers and people with this condition may live into their 40s or 50s. The disease is named after the short story and movie "The Curious Case of Benjamin Button" because the main character in the story is born looking like an old man and ages in reverse.