An<unk>  is a medical condition due to reduced functionality of<unk><unk> .
It is sometimes considered synonymous with the term accelerated aging disease, which is a genetic disorder in which various tissues, organs or systems of the human body age prematurely. Because the accelerated aging diseases display different aspects of aging, but never every aspect, they are often called segmental progerias by biogerontologists.
This is in contrast to Progeria (Hutchinson-Gilford Progeria syndrome), which affects a broader spectrum of functions.
DNA repair-deficiency disorder
Radiation injury
Vascular injury
Chromium deficiency
Autoimmune disease
Genetic disorder
Brain damage
Congenital abnormality