Question

what is a inmature aging prossess

Answer 1

progeria-is an extremely rare genetic condition wherein symptoms resembling aspects of aging are manifested at an early age.
http://en.wikipedia.org/wiki/Progeria

Werner Syndrome (WS) (also known as "Adult progeria" is a very rare, autosomal recessive disorder characterized by the appearance of premature aging.

wingspanayne syndrome (also called Weber-wingspanayne syndrome, or Neill-Dingwall Syndrome) is a rare autosomal recessive congenital disorder characterized by growth failure, impaired development of the nervous system, abnormal sensitivity to sunlight (photosensitivity), and premature aging.
http://en.wikipedia.org/wiki/wingspanayne%27s_syndrome