Someone with this condition may develop normally in childhood and adolescence. Once the person reaches their twenties, they may take on the appearance of someone much older. Characteristics of aging, such as gray hair, thinning of the skin and hair loss, begin to appear. Werner syndrome may also cause someone to experience the normal diseases of aging at a much younger age. These diseases include cataracts, osteoporosis, hardening of the arteries, skin ulcers and some cancers. People with this syndrome are usually of short stature because of how the genetic mutation affects DNA.