What is Kearns-Sayre syndrome?

This is a very rare syndrome and is also known as oculocraniosomatic disease. The main characteristics of the syndrome are ophthalmoplegia and several endocrine abnormalities. One of the main endocrine abnormalities is diabetes mellitus as well as hypoparathyroidism and hypopituitarism. The cause and pathogenesis of the syndrome are not fully understood, but it is thought that there may be an important autoimmune component.