Endocrine glands secrete hormones into the blood stream and have an affect on the body's systems. A lack of an endocrine hormone causes an endocrine disorder. Unusual cancers such as Thyroid carcinoma is an unuasal cancer that may develop in people who have Werner Syndrome. It is caused by the high production of calcitonin. Cataract disorders are where the lens of the eye becomes partly or completely obscure.
Retinal disorders are muscular degeneration or retinal dystrophy.
Gene that affects aging is isolated in the patients with rare disease. Online Medelian Inheritance in Man. 2 February 2001. Clinical Molecular Genetics Society Website. 2 February 2001.